I think it's coz the different colors represent all the different genders and sexualitys and things??? Idk ask google

When in doubt ask Google.

It stems from a history of bright colors being used to signal to other gay people that you were gay, too. In Australia, bright yellow socks were used; in the U.K., a green carnation; the rainbow flag was actually originally 8 colors, each representing something specific, but 2 were dropped because the cost of manufacturing was too high. It wasn't meant to be a rainbow but now it is.

The colors were : Hot pink for sex Red for love Orange for healing Yellow for sunlight Green for nature Blue for art Indigo for harmony And violet for the human soul. Hot pink and indigo were too expensive so are no longer on the flag This flag was created by Gilbert Baker in 1978.

Some say the design may have been inspired by hippies (who used rainbows to symbolize peace) or Judy Garland's song 'over the rainbow' from the wizard of oz. Judy herself was an avid homosexual and helped the cause a lot.

omg i like art and my fav colour is blue ITS DESTENY