I'll try to list as many pride colors as I can think of.
Gay Pride (Six stripes of the rainbow but without indigo - Gay, Gay Men, Lesbians, Homosexuality, and sometimes the entire LGBT community. This was created by a San Francisco artist named Gilbert Baker in 1978. The flag originally had the stripes of all the colors of the rainbow and one pink stripe; from top to bottom, it was pink, red, orange, yellow, green, blue, violet/purple, and indigo. Pink represented sex, red represented life, orange represented healing, yellow represented sunlight, green represented nature, blue represented art, indigo represented serenity, and violet represented spirit. Later, pink was removed from the flag because of availability of fabric issues, so it became the seven colors of the rainbow. In 1979, indigo was removed because of visibility reasons when posted on Market Street in San Francisco, so the current flag has six stripes: red, orange, yellow, green, blue, and violet/purple. The term "homosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny.)
Labrys Lesbian Pride (Purple with Labrys in inverted black triangle [different versions exist] - Lesbians, women, and feminism, and all people who identify as female who are attracted to females. Labrys became a symbol of lesbians and feminists due to the popularity of a female empowerment publication called Labrys Magazine. In addition, the black triangle is a symbol of lesbians due to the fact that many lesbians were forced to wear it in concentration camps during the Holocaust under the idea that they were "asocial" and did not conform to heteronormativity).
Bisexual Pride (Pink, Purple, and Blue - Bisexuals. Pink stands for attraction to females, blue stands for attraction to males, and purple stands for attraction to both.)
Pansexual (Pink, yellow, blue - Pansexual. According to Wikipedia: "The pansexual pride flag was designed as a symbol for the pansexual community to use. The pansexual pride flag has been found on various internet sites since mid-2010. . . . The pansexual pride flag is used to increase visibility and recognition for the pansexual community, and to distinguish it from bisexuality. It is used to indicate that pansexuals have romantic attractions and relationships with people of different genders and sexualities. . . . The pansexual flag consists of three colored horizontal bars: pink, yellow, and blue. The blue portion of the flag represents those who identify within the male spectrum (regardless of biological sex), the pink represents those who identify within the female spectrum (regardless of biological sex), and the yellow portion, found in between the blue and pink portions, represents non-binary attraction; such as androgynous, agender, bigender and genderfluid people.)
Omnisexual Pride - (Five horizontal stripes, from top to bottom: light pink, pink, dark blue, blue, light blue - The origins of this flag is unknown to me. I do not know who coined the term "omnisexual," nor who created the flag. Thus, I am uncertain what the flag colors mean, but my guess is that the shades of pink and blue represent spectra of different and all genders, to which omnisexuals are attracted.) 
Polysexual Pride (Pink, green, and blue - Polysexual. Based on bisexual colors.. Pink represents attraction to females. Blue represents attraction to males. Green most likely represents attraction to people with non-binary gender identities.)
Transgender Pride (Light blue stripe, pink stripe, white stripe, pink stripe, blue stripe - Transgender people. This flag was created by a trans* woman named Monica Helms who says: "The stripes at the top and bottom are light blue, the traditional color for baby boys. The stripes next to them are pink, the traditional color for baby girls. The stripe in the middle is white, for those who are intersex, transitioning or consider themselves having a neutral or undefined gender. The pattern is such that no matter which way you fly it, it is always correct, signifying us finding correctness in our lives.")
Skoliosexual Pride (Yellow, green, white, and black horizontal lines with a lavender outline of a heart in the middle - Skoliosexual/Ceterosexual. Yellow represents being non-binary or attracted to non-binary people. Green represents bigender, third gender, genderqueer, or other genders. White and black represent neutral genderlessness, agender, questioning gender identity, etc. The outline of the lavender heart represents love outside the gender norms. I created this flag, but nedle is the one who invented the word. Also, ceterosexual is another word for skoliosexual.)
Heteroflexible Pride (Six grey spectrum stripes with six thin colorful rainbow stripes in the middle. Color stripes, from top to bottom: red, orange, yellow, green, blue, violet - Heteroflexible pride. The grey spectrum represents a basis of heterosexuality while the six-colored rainbow stripe represents the flexible homosexual element.) 
Homoflexible Pride (Six colorful rainbow stripes with six thin grey spectrum in the middle. Color stripes, in order from top to bottom: red, orange, yellow, green, blue, violet - Homoflexible Pride. According to its creator: "You’ve got your basic 6 stripe rainbow flag, mostly to match with the heterosexual flag. The stripe of heterosexual flag is is the ‘flexible’ part.")
Abrosexual Pride (Five horizontal stripes. From top to bottom: turquoise, light turquoise, white, pink, and hot pink - Abrosexual Pride. An anonymous tumblr user coined the term. The flag was created by a tumblr user named Mod Chad after another anonymous person requested it. The anonymous user said, "could you guys possibly make an abrosexual pride flag?? maybe something along the lines of the typical five color flags that fades from #46D294 to white to #EE1766." It is unknown why this person chose these colors specifically.)
Biromantic Pride (Three horizontal stripes and a heart split into darker corresponding three horizontal stripes. From top to bottom, the three stripes in the background are light pink, light purple or possibly lavender, and light blue. From top to bottom, the heart's stripes are pink, purple, and blue - I do not know who created the flag, coined the term, or what the flag's creator choose the colors to mean. However, it is obvious that the pink, purple, and blue color scheme is from the bisexual pride flag color [see above]. Pink stands for attraction to females, blue stands for attraction to males, and purple represents attraction to both males and females. The heart most likely represents romantic attraction.)
Biromantic Homosexual Pride (Six horizontal stripes in the background, which are the colors of the rainbow with indigo left out, and a heart in the foreground that is divided into horizontal stripes [from top to bottom] pink, purple, and blue - Biromantic Homosexual Pride. The term "homosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny. This is a combination flag that represents people who are biromantic homosexuals. I do not know who created the flag, coined the term biromantic, or what the flag means according to its creator. However, it seems to be a combination of the gay rainbow pride flag and the bisexual flag. The gay pride flag is probably represented in the background by the six stripes (rainbow but without indigo), which symbolizes attraction to the opposite gender. If the colors correspond to the rainbow pride flag, then red means life, orange means healing, yellow means sunlight, green means nature, blue means art, and violet stands for spirit. The heart is probably a symbol for romantic orientation. The pink on the heart probably represent attraction to females, blue probably represents attraction to males, and purple probably represents attraction to both).
Biromantic Heterosexual Pride (Six horizontal black and white stripes [top to bottom alternating starting with black] in the background, and in front of that is a heart divided into three horizontal stripes which are [top to bottom] pink, purple, and blue - Biromantic Heterosexual Pride. This is a combination flag that represents people who are biromantic heterosexuals. The term "heterosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny. I do not know who created the flag, coined the term biromantic, or what the flag means according to its creator. However, it seems to be a combination of the heterosexual flag and the bisexual flag. The heterosexual flag is probably represented in the background by the black and white stripes. Black and white most likely represent opposite gender attraction. The heart is probably a symbol for romantic orientation. The pink on the heart probably represent attraction to females, blue probably represents attraction to males, and purple probably represents attraction to both.)
Panromantic Pride (Three horizontal stripes and a heart in the middle, with the stripes also going across the heart, though with darker/brighter colors. The stripes are light pink, pale yellow, and light blue in order from top to bottom. The horizontal stripes that intersect these stripes and form the heart are pink, yellow, and blue from top to bottom - Panromantic Pride. I do not know who invented this version of the panromantic heart symbol or flag, but it is clearly based on the pansexual flag that is pink, yellow, and blue. Pink stands for attraction to females. Blue stands for attraction to males. Yellow stands for non-binary attraction. The heart shape is most likely a symbol for romantic orientation. I do not know who coined the term panromantic.)
Panromantic Homosexual Pride (Six horizontal stripes in the background and a heart divided into three horizontal stripes in the foreground. The background stripes are, from top to bottom: red, orange, yellow, green, blue, and violet/purple. The three horizontal stripes of the striped heart are pink, yellow, and blue, in order of top to bottom - Panromantic Homosexual Pride. This is a combo flag that pairs a specific romantic orientation [panromanticism] with a specific sexual orientation [homosexuality]. I do not know who invented the panromantic heart symbol or flag, but it is clearly based on the pansexual flag that is pink, yellow, and blue. Pink stands for attraction to females. Blue stands for attraction to males. Yellow stands for non-binary attraction. The heart shape is most likely a symbol for romantic orientation. I do not know who invented the term "panromantic," but the term "homosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny.)
Panromantic Heterosexual Pride (Six horizontal black and white stripes [top to bottom starting with black] in the background, and in front of that is a heart divided into three horizontal stripes which are [top to bottom] pink, yellow, and blue - Panromantic Heterosexual Pride. This is a combo flag that pairs a specific romantic orientation [panromanticism] with a specific sexual orientation [heterosexuality]. I do not know who invented the panromantic heart symbol or flag, but it is clearly based on the pansexual flag that is pink, yellow, and blue. Pink stands for attraction to females. Blue stands for attraction to males. Yellow stands for non-binary attraction. The heart shape is most likely a symbol for romantic orientation. The heterosexual flag in the background is represented in the background by the black and white stripes. Black and white most likely represent opposite gender attraction or the gay rainbow pride flag with its colors removed. I do not know who coined the term "panromantic." The term "heterosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny.)
Panromantic Asexual Pride (Four horizontal stripes in the background and a heart divided into three horizontal stripes in the foreground. The background stripes are, from top to bottom: black, grey, white, and purple. The three horizontal stripes of the heart are pink, yellow, and blue, in order of top to bottom - Panromantic Asexual Pride. This is a combo flag that pairs a specific romantic orientation [panromanticism] with a specific sexual orientation [asexuality]. The person who created the panromantic asexual flag is deviantART user crownstamps. crownstamps did not mention what the colors and symbols and of the flag means, but it is fairly certain that they combined the asexual flag [black, grey, white, and purple horizontal stripes] with the pink, yellow, and blue striped heart symbol of panromanticism. I do not know who invented the panromantic symbol or flag. According to this article: "In the Summer of 2010, a number of asexuality sites, led by users on AVEN, came up with a number of designs for an asexuality flag, then held a multi-stage vote to determine the winner The selected design was created by AVEN user standup, and first posted at 4:36 PM on June 30th, 2010.")
Two-Spirit Pride (Rainbow flag with a Native American symbol in the middle - Two-Spirit identified people. The rainbow represents the LGBT spectrum, and the Native American symbol represents the cultural origin of Two Spirit.)
Genderqueer Pride (Lavender, white, and dark green - Genderqueer Pride. Lavender is a mixture of blue and pink and represents genderqueer people who identify as both male and female. The white stripe represents genderqueer people who fall outside of the female-male binary. Dark green represents the inverse of lavender for those who do not identify as female nor male).
Feather Pride (A gold phoenix in front of red triangles and a black and white triangle pattern - Drag pride, drag queen pride, drag king pride, pride for those attracted to people in drag, and other fetishes. The phoenix is a symbol of rebirth while the red triangles represent the passion that the drag community had during the early days of the AIDS epidemic. NOTE: The Feather Pride flag has nothing to do with fetishes concerning feathers or birds. The name comes strictly from the phoenix symbol and only represents the drag community, people attracted to people in drag, and similar sexual orientations and gender identities.)
Androgynous Pride (Gray flag with an equal sign in which the top part is blue and the bottom is pink - Androgyny. The gray part of the flag represents the gray area between genders. The equal sign represents the equality between men and women.)
Bigender Pride (Purple, light pink, light blue, cyan, and blue - Bigender people. This is one of the most popular bigender flags. I am not entirely certain of its origins nor the definitive meaning of its colors, but an educated guess would be that white represent trans* identity, light pink and shades of blue might represent femininity and masculinity, and purple represents the mixture of masculine and feminine identities because blue and pink make purple.)
Intersex Pride (Purple circle against a yellow background - Intersexuality. Yellow represents neutrality in gender instead of associating masculinity with blue and femininity with pink. It is also the main color of the Hermaphrodite Flag. The circle symbolizes wholeness).
Trigender Pride (Pink stripe, blue stripe, green stripe, blue stripe, and pink stripe - Trigender and possibly Third Gender. Pink stands for femininity or female gender, blue represents masculinity or male gender, and green represents non-binary.)
Hermaphrodite Pride(Stripes in shades of orange, yellow, and green with purple Mercury symbol - Hermaphrodite Pride. Yellow represents neutrality in gender instead of associating masculinity with blue and femininity with pink. The flag is based on the Gay Pride flag in the sense of having a spectrum of hues that represent a fluid spectrum of gender. The symbol in the center is that of the planet and Roman god Mercury, which is purple symbolizing the mixture of pink and blue as feminine and male colors. Though I am not completely certain why Mercury's symbol was chosen, I would guess that it may have been because Mercury is the Roman equivalent of the Greek god Hermes, father of Hermaphroditus, the namesake of the term "hermaphrodite." NOTE: Hermaphrodite should not be confused with "intersex." The word "intersex" is an umbrella term used for a variety of conditions in which a person is born with a reproductive or sexual anatomy that doesn’t seem to fit the typical definitions of female or male. According to Pride-Flags:"The word 'hermaphrodite' originally meant 'a person or animal having both male and female sex organs or other sexual characteristics, either abnormally or (in the case of some organisms) as the natural condition.' It is a stigmatizing and misleading word when used to refer to an intersex person. There is growing momentum to eliminate the word 'hermaphrodite' from medical literature and to use the word 'intersex' in its place. While some intersex people do reclaim the word 'hermaphrodite' with pride to reference themselves, it should be generally avoided except under specific circumstances. This word is not interchangeable with intersex and you should only refer to someone as hermaphrodite if they specifically tell you that you can.")
Genderfluid Pride (Pink, white, purple, black, blue - Genderfluid. Pink represents femininity. White represents all genders. Purple represents masculinity and femininity. Black represents genderlessness. Blue stands for masculinity.)
Genderflux Pride (Six horizontal stripes, from top to bottom: Pink, light pink, pale yellow, grey, cyan, and blue. The light pink and cyan stripes are thinner than the rest - Genderflux. Created by nova-pride-flags with colors chosen to cause less eyestrain and visual sensitivity.) 
Nonbinary Pride (Horizontal stripes. From top to Bottom: yellow, white, purple, and black - Non-binary gender identity. According to Nonbinary.org it was invented by "Kye Rowan in 2014. Yellow is for gender without reference to the gender binary. White: those with many or all genders. Purple: a mix of female and male. Black: without gender.")
Pangender Pride (Seven horizontal stripes. From top to bottom: pale yellow, pink, light pink, white, light pink, pink, and pale yellow. - Pangender. created by Pangendering] and according to Nonbinary.org: "based on the agender pride flag. The colors are very bright so that they represent the multiplicity of genders [because the white light, in the electromagnetic spectrum, is a combination of all colors.]")
Panflux Pride (Five horizontal stripes. From top to bottom: hot pink, orange, yellow, light green, and blue - Panflux pride. CinnamonGem created the flag, but their deviantART account is deactivated. It is unknown what the colors mean, but I would guess would be that hot pink, yellow, and blue are derived from the pansexual flag and the other colors (orange and yellow) exist to create more of the flow of a spectrum. NOT to be confused with the gay rainbow flag, which has six stripes and uses red instead of hot pink.)
Panfluid Pride (Seven horizontal stripes. From top to bottom: Light purple, lavender, light orange, yellow, light orange, lavender, light purple. The term "panfluid" was coined by nepkrisprite, who also designed this flag. The meanings of its colors are unknown).
Polygender Pride (Five horizontal stripes. From top to bottom: Black, grey, pink, yellow blue - Polygender Pride. According to its creator the-war-outside--our-door it also represents "anyone whose identity includes more than one gender- genderfluid people, bigender people, trigender people, polygender people, some demigender people, etc." the-war-outside--our-door explains the colors: "The pink and blue stripes are for masculinity and femininity respectively, and those who feel partially male/female. The yellow is for genders outside the binary. The black is for those who feel partially agender- I know it’s not a gender, but I’ve heard of quite a few people who would describe themself as bigender with agender as one of their genders. The grey is for those whose gender(s) change or fluctuate.")
Asexual Pride (Four horizontal stripes. From top to bottom: Black, grey, white, and purple. - Asexual Pride. Black stands for asexuality. Grey stands for Grey-Asexuality and Demisexuality. White stands for non-asexual partners and allies. Purple represents community. The flag was created by an AVEN user called standup in 2010 as part of a contest. The full story is here: Asexual Flag History).
Demisexual Pride (A thick white stripe, thin purple stripe, and a thick gray stripe with a black triangle on the dominating the left side - Demisexuals. Black stands for asexuality. Grey represents Gray-Ace and demisexuality. White represents sexuality. Purple represents community.)
Autochorissexual Pride (A triangle pointing toward with horizontal stripes in the colors purple, white, grey, and black juxtaposed to two smaller triangles with horizontal stripes in the colors black, grey, white, and purple - Autochorissexuality. [Anthony Bogaert created the term and says that it is a sub-section of asexuality. It represents people who do not want to have sex with another person nor experience sexual attraction to others but still are aroused by observing sexual content that may include pornography, sexual fantasies, erotica, etc.] Hunterinabrowncoat created the flag. Purple, white, grey, and black are the colors of the asexual flag. The black stripe represents asexuality. The gray stripe represents grey area between sexual and asexual feelings. The white stripe represents sexuality. The purple stripe represents community. The inverted triangle represents the idea that autochorissexuals have an inverted perspective on sexuality; Hunterinabrowncoat says that asexuals are not attracted to others though some asexuals engage or desire to engage in sexual activities while autochorissexuals have sexual attraction but do not want to engage in sexual activities).
Graysexual Pride (Horizontal stripes [in order of top to bottom]: purple, grey, white, grey, and purple - Greysexuality. Created by Shikku27316 as a proposed flag. "My original explanation was kinda dumb. The purple was asexuality, the white was allosexuality, and the grey was the region of "getting over" asexuality, and then "getting over" allosexuality to be asexual again, but that sounds pretty dumb, plus it's not the only definition of greysexual. So, the colours mean the same, but it's kinda symbolising the two coming together to make the grey area." - Shikku27316 [Of course, I don't think it was dumb. 
If you get the chance, say something nice about it to Shikku]).
Autosexual Pride (two horizontal stripes, from top to bottom: light blue/cyan and grey; a red heart in the center with a black outline that ends in an arrow - Autosexuality. The term was coined by sex researcher Bernard Apfelbaum. The creator is aturinfortheworse , who had partially forgotten the meaning of the flag until asked by an anonymous person and says: "I think the red is for love/sexual attraction. Grey for some connection to the ace/grey-ace flag because there’s a lot of overlap. I’m really stumped by the pale blue . . . something to do with the pansexual flag, i think? No, right, okay; I’ve got it, I think. So the main people - as far as I can tell, and by no means am I suggesting this is all - who are autosexual are either Potential Attraction to Literally Anyone (as in pansexual, self inclusive) or are attracted to only themselves and often identify as ace/grey-ace. So the blue is from the pansexual flag and the grey is from the ace flag. With this in mind, I just thought of a simpler flag: grey stripe, red stripe, blue stripe.")
Demiromantic Pride (Black triangle on the left side, three horizontal stripes, from top to bottom: white, green, and grey. The green line is very thin - Demiromanticism. I do not entirely know who created this flag (or what the colors originally mean). However, using an educated guess based on what these colors mean in other pride flags, I think: white might represent sexuality, green might represent the opposite of red as being associated with romanticism, black might represent asexuality, grey might represent Gray-sexuality or the Gray-sexual spectrum. The black triangle mimics that of the demisexual flag).
Demigender Pride (Five horizontal stripes. From top to bottom: thin grey line, thick yellow line, thin white line, thick yellow line, and thin grey line. Proposed Demigender Flag. Sometimes people use the deminonbinary flag [see below] as both the deminonbinary and demigender flags. I do not know who coined the term "demigender" nor who designed this one. I found it on Nonbinary.org's Demigender article, which explains the flag colors as: "Yellow: nonbinary. White: agender or gender (concept). Gray: partial.")
Deminonbinary Pride (Seven horizontal stripes. From top to bottom: dark grey, grey, yellow, white, yellow, grey, dark grey. - Deminonbinary and sometimes Demigender. Created by alexander—the-great. Grey represents semi/demi-gender, as if to be a gender version of grey ace. Yellow represents non-binary genders. White is a combination of all genders.)
Demifluid Pride (seven horizontal stripes. From top to bottom: dark grey, grey, rainbow spectrum, white, rainbow spectrum, grey, dark grey - Demifluid. I'm not sure who created this flag or what its design means, but my guess would be grey and dark grey as partiality or a rejection of a black -and-white cissexist gender binary, white as gender neutrality, and the rainbow spectrum as a representative of fluidity.)
Demiflux Pride (seven horizontal stripes. From top to bottom: dark grey, grey, pink, yellow, blue, grey, dark grey. - Demiflux. Created by aflutteringlaney. Grey represents partial gender. Pink represents femininity. Yellopw stands for nonbinary. Blue stands for masculinity.)
Endogender Pride (five horizontal stripes. From top to bottom: green, dark green, light green, dark green, green. - Endogender. Created by nova-pride-flags and colors specifically designated to be more accessible for people with eye-strain and other sensory issues. In addition to issues about eye strain, green often symbolizes non-binary gender.)
Endoboy Pride (five horizontal stripes. From top to bottom: blue, grey, lavender, grey, blue. - Endoboy. "Colors represent the spectrum of identities. The Outer Blues represents Masculinity. The Light Lavender in the middle is a mix of Pink, Blue, and Grey to represent people who shift to partially feminine/masculinie/genderless/nonbinary feeling.")
Endogirl (five horizontal stripes. From top to bottom: pink, purple, lavender, purple, pink. - Endogirl. "Colors represent the spectrum of identities. The Outer Pinks represents Femininity. The Light Lavender in the middle is a mix of Pink, Blue, and Grey to represent people who shift to partially feminine/masculinie/genderless/nonbinary feeling." The lavender color stripes were not mentioned, but lavender often represents a mixture of male and female [being that it is a blue combined with pink]).
Genderplus Pride (three horizontal stripes from top to bottom: medium dark gray, grey, medium dark grey. In addition, there is a red plus sign in the middle of the center stripe. - Genderplus, presence of gender. This flag was created by a tumblr user named allofyouguysarefuckingannoying: who could not find an existing gender identity and created this term. The meaning of the colors are unknown, but the grey and dark grey might represent partial gender or partial genderlessness, and the red plus sign most likely represents positivity as in presence of gender).
Genderpositive Pride (five horizontal stripes with a red plus sign in the middle. From top to bottom: red, white, orange, white, and red - Genderpositivity. "There are no meanings for individual stripe colours. Rather the colours were chosen in order to reflect positivity, activity, and to “pop” out at the viewer and make it known they are present. Just like one’s gender would be if they were feeling G+.")
Gendernegative Pride (three horizontal stripes from top to bottom: medium dark gray, grey, medium dark grey. In addition, there is a dark blue subtraction sign in the middle of the center stripe. - Gendernegative state. This flag was created by a tumblr user named allofyouguysarefuckingannoying who could not find an existing gender identity and created this term. "There are no meanings for individual stripe colours. Rather the colours were chosen to represent negativity, a sedentary state of being, mellowness. The colours were chosen to be overlooked and not really acknowledge that they exist, just like your gender would be if one were feeling G-." A variation of this flag is listed by here.)
Greygender Pride (Five horizontal stripes, from top to bottom: grey, white, blue, white, and black. The white stripes are much thinner than the other stripes - Greygender / Graygender Pride. According to invernom, who both created the term and the flag, the colors represent: "The two shades of grey, one lighter and one darker, represent the spectrum of experience this identity covers, since people identifying as graygender might feel gender to a lesser or greater degree than one another. The deep blue represents graygender as an identity and experience, which I’ve always thought of in terms of deep ocean water - it’s calm but it still has a subtle fluidity and variation, and because it’s darker deep below the surface it’s harder to determine what’s going on in it, but it’s still beautiful and full of interesting and mysterious things. And the white represents the purity and validity of graygender people and our experiences. Even if we feel gender less often or strongly than most, or don’t present it as much, etc., doesn’t make our gender lesser or invalid.")
Cavusgender Pride (three horizontal stripes, from top to bottom: light pink, yellow, light blue, with one vertical blue stripe in the center. - Cavusgender. I do not know who coined this term, who designed this flag, or what its colors official represent. However, my guess is that light pink represents females and feminine genders, light blue might represent males and masculine genders, blue might represent depression and sadness, and yellow might represent happiness and other emotions other than depression.) 
Demiboy Pride (seven horizontal stripes, from top to bottom: dark grey, grey, cyan, white, cyan, grey, dark grey - Demiboy / Demiguy / Demimasculine. Flag was created by a tumblr user with the screen name Transrants. According to Nonbinary.org's Demigender page, the colors mean: "Blue: male. White: agender or nonbinary gender. Grey: partial.")
Demigirl Pride (seven horizontal stripes, from top to bottom: dark grey, grey, light pink, white, light pink, grey, dark grey - Demigirl / Demifeminine. Flag was created by a tumblr user with the screen name Transrants. According to Nonbinary.org's Demigender page, the colors mean: "Pink: female. White: agender or nonbinary gender. Grey: partial.")
Agender Pride (Black, grey, white, green, white, grey, black horizontal stripes, in that order from top to bottom - Agender. According to The Gender Wiki's Pride Flag Page: "Both black and white represent the complete absence of gender. Grey represents being semi-genderless. Green represents nonbinary gender, because it is the inverse of purple." It was created by a tumblr user with the screen name transrants in 2014).
Gendervoid Pride (Five horizontal lines, from top to bottom: dark blue, grey, black, grey, and dark blue - Gendervoid. Flag originally created by: novusnova and term coined by baaphomett. Original meaning of the colors is unknown, but it is generally assumed that the dark, bleak colors represent a void or emptiness.)
Neutrois Pride (White, green, and black horizontal lines - Neutrois [genderless, agender, neutral gender, etc]. The white stripe stands for neutral, unidentified, or questioning gender. The green stripe represents non-binary gender. The black stripe represents agender, asexuality, or third-gender.)
Aromantic Pride (Green, yellow, orange, and black - Aromantic. Created by cameronwhimsey. "We designed the flag to be as inclusive as possible and we used fairly basic color symbolism. Green, (being the opposite, complimentary color to red, which usually represents romance), represents aromanticism. Yellow, like the yellow rose which represents friendship, stands for various forms of queerplatonic love. Orange, being red once removed toward yellow, represents lithromantics. And black represents romantics who choose to reject traditional romance." This is the original proposed aromantic flag, but others exist because this flag has similar colors to the Jamaican and Rastafarian flags.)
Akoiromantic Pride (Five horizontal stripes, from top to bottom: red, orange, yellow, white, and black - Akoiromantic / Lithromantic / Apromantic Pride. Created by thejasmineelf as a lithromantic pride flag. "Red represents community, as it is traditionally a color of leadership, life, and sensitivity. Orange represents lith-ness, as it does on a version of the aro flag. Yellow represents our varied relationships, also as it does on on the mentioned aro flag. Yellow traditionally represents friendship, loyalty, and honor. White represents romanticism and sexuality. Black represents aromanticism and asexuality."
Polyamory Pride Flag - (Blue, red, and black with a gold lowercase pi from the Greek alphabet. Polyamory. Blue represents openness and honesty between all lovers involved in each relationship. Red represents love and passion. Black represents all people in open and consensual relationships who have to hide their relationships due to social discrimination. The golden pi represents the value placed on emotional attachments to others.)
BDSM Pride (Black stripe, blue stripe, black stripe, blue stripe, white stripe, blue stripe, black stripe, blue stripe, black stripe, and the Quagmyr's BDSM emblem in red and white in the middle - BDSM subculture [Bondage and Discipline, Sadomasochism, and Domination and Submission]. Based on the Leather flag combined with Quagmyr's BDSM emblem.)
Lipstick Lesbian Pride (Stripes of different shades of red, purple, and pink with a white stripe in the middle as well as a lipstick print in the upper left corner. - Lipstick / Femme / Feminine Lesbians and other feminine female identified people who are attracted to female identified people. The shades of red, purple, and pink represents traditionally female associated colors. Though popular and well-known, this flag is controversial because its creator has said racist, biphobic, and other ignorant and intolerant things in her blog.)
Butch Lesbian Pride (Seven horizontal stripes that are all shades of blue except the center white stripe - Butch lesbian pride, sometimes butch pride for masculine women who are interested in women but not lesbians. It was created by dorian--rutherford.tumblr.com/, but I do not know for certain what the colors were supposed to mean. However, my guess is that blue probably represents masculinity and white represents gender.)
Gay Man Pride / Gay Male Pride (Seven horizontal stripes, from top to bottom: dark teal, teal, light teal, white, light blue, blue, dark blue - Gay man and gay male pride. It is a proposed flag created by Anonymous and Mod Hermy on tumblr because there are many well-known lesbian pride flags out there but very few gay male pride flags. According to this page on tumblr: "anonymous wanted blues and purples, but it looked too much like the butch lesbian flag so Hermy suggested using greens instead. Color meanings: Based on the pink lesbian flag [Link].")
Twink Pride (Three horizontal stripes ... from top to bottom: pink, white, and pale yellow with conjoined male symbols - Twinks. I have not been able to find the true meaning of this flag online, so I will just make an educated guess based loosely on meanings of the same colors in other flags. Pink might might represent effeminacy or femininity because twinks are often described as very "femme" due to their youth, minimal body hair, and slimness. It may also represent gay men in general. White might represent sexuality. Pale yellow might represent youth and happiness. The two intertwined male symbols represents gay men or all males who are attracted to other males."
Boi Pride (from right to left, top to bottom, diagonal stripes at a 45 degree angle Green stripe, black stripe, green stripe, black stripe, white stripe, black stripe, green stripe, black stripe, green stripe, and a red heart in the upper right corner - Boi or boy, with boi sometimes associated with butch lesbian or young gay man. Based on the Leather pride flag, the diagonal tilt represents the elevated status of the Sir over the submissive status of the boi or boy. The red heart is in the right corner to symbolize where a boi/boy's heart is, and the green color represents a boyish color, possibly denoting the "green" or inexperienced young man.)
The International Bear Brotherhood Pride Flag (Brown, orange, yellow, light beige, white, grey, and black with a bear paw print in black in the upper left corner - Bears [hairy gay men]. The colors represent the various skin tones and natural hair colors as a sign of equality and unity. In addition, hair color has a connection to the body hair of self-identified bears.)
Androphilia Pride (Black, gray, white, and green - Androphilia and androsexuality. The meaning of each color in the flag is unknown for certain, but it is possible to make an educated guess based on other pride flags. Black could stand for gender neutrality or rejection of the straight-gay binary and the female-male binary. Gray might stand for the gray area between genders, reflecting that many gender non-conforming people identify as androphilic. White may represent equality, intersexuality, transitioning or neutral gender, or the idea that attraction to males does not equate to femininity. Green might symbolize masculinity or attraction to males.)
Gynephilia Pride (Black, gray, white, and pink - Gynephilia, gynosexual, gynesexual. The flag is not an official flag, just a proposed one. It appears to be based on the Androphilia Pride Flag. It is uncertain what each color stands for, but based on the Androphilia Pride Flag and other flags, this is my educated guess. Black could stand for gender neutrality or rejection of the straight-gay binary and the female-male binary. Gray might stand for the gray area between genders, reflecting that many gender non-conforming people identify as gynephilic. White may represent equality, intersexuality, transitioning or neutral gender, or the idea that attraction to females does not necessarily a result of masculinity or femininity. And pink is probably a tribute to attraction to all female identified people.)
Victory Over AIDS flag - (Red, orange, yellow, green, blue, purple, and black stripes. Made for AIDS victims and those who support them. Clearly based on the Gay Pride rainbow flag. Although it is based on the Gay Pride flag, it most likely does not only represent AIDS in the male gay community. A person of any sexual orientation or gender identity can contract HIV or AIDS. The extra black stripe probably represents death, but it is possible that it represents triumph over darkness).
Marriage Equality (A red background with a pink equals sign - For all those who support the right of people to marry whomever they choose, regardless of sexual orientation or gender identity. It is usually representative of the battle for same-sex marriage in the United States but can also represent equal marital rights internationally. The flag was originally a blue background with a yellow equals sign. It was created by the Human Rights Campaign, an organization that fights for LGBT rights. It became increasingly popular at the same time that the demand for equal marital rights sparked the nation, so the organization changed it to red and pink to represent love, passion, equality, and the queer community.)
Ally Pride (Inverted V-shaped Rainbow triangle against black and white stripes - Allies, who usually identify as straight and cisgender, supporting the LGBT community, though it can also include people of all sexual orientations and gender identities. The inverted rainbow V represents the A in Activism while the black stripes represent heterosexuality.)
Metrosexual Pride (Light gray stripe, dark gray stripe, black stripe, purple stripe, black stripe, dark gray stripe, light gray stripe with a picture of a metrosexual man in the upper left corner [the man might be Mark Thaler, creator of the flag] - Metrosexual. It is unclear what each color means. The creator Mark Thaler sells memorabilia with this flag on it.)
Heterosexual Pride (Black and white stripes - Heterosexual, usually cisgender, people. The black and white stripes represent attraction to the opposite sex. The term "heterosexual" was coined in the mid-19th century by an Austro-Hungarian journalist named Károly Mária Kertbeny. This is a very controversial flag because unlike the Ally Pride flag, which represents straight people and others who specifically support the LGBT community, the heterosexual flag is not necessarily an ally flag. Some heterosexual-identified people use the flag as a homophobic reaction to LGBT pride. Others may use the flag as an indicator of their sexual orientation, but even that motivation is very questionable to the idea of equality in the face of privilege. However, it is possible to be heterosexual and trans* or non-binary, so sometimes people use this to represent pride while still being part of the LGBT community.)
Cisgender Pride (Three horizontal stripes, from top to bottom: Grey, Light Grey, and Grey. Cisgender. I do not know who created this flag or what the colors originally meant, but my guess is that Grey might represent so-called "normalcy" [even though cisgender people are not somehow more normal than anyone else] and Light Grey might represent gender in general).
