Are you trying to say color?
There isn't a color people use to identify their sexuality. It doesn't exist.
(Not even pink for gay)
But the rainbow is a very know symbol for the LGBT community if that helps.
Favorite clour
red
Pure-Black
11
Purple.
grey, blue, black
short black hair
white
Horse Shoe Crab.
green
The black box is usually red in colour.
Gray is usually associated with depression or humility.