Beltzaain is a colorgender and xenogender that is connected with the color black. This gender may or no may be related to the night, the moon, space, technology, darkness, etc.
This term was coined by Tumblr user caergenderfleur on December 17th 2018. The original beltzaain flag was created by the same user on the same date.
Beltzaain from the basque word for black, beltza.