Rainbowgender is a xenic aesthetigender under the colorgender umbrella connected to the color spectrum as a whole. This could also be a gender identity in which one feels as though they are all colorgenders at once. The fluid equivalent is Huegender.
History
The term was coined alongside many other colorgender identities by Tumblr user mogai-guy on February 3rd, 2019.[2]
Flag
The flag was coined by Tumblr user mogai-guy on February 3rd, 2019. The second is an alternative flag created by an unknown, with the intent to be used as a simpler version of the flag that eliminates the gradient effect.