I was always thinking that staff and regular players should have different colors, like staff had warm colors, players have cool colors.
I the helper/mod chat should be orange
supermod should be a green
Admin/tech should be red
Supreme can stay purple
Ults should get a choice of the current helper/mod blue and the current supermod cyan, and of course the purple that they have already paid for.
quick edit: I would not have upgraded to ult if it wasn't a birthday gift. Simply because of the chat color. I know several people refuse to upgrade because of the chat color. We need those donations, lol.
edit x2:
Helper/mod = green chat
Supermod = the light red, almost pink color looks kinda like this but more red
admins have the normal darker red
That way no one's stuck with orange because no one likes orange.
(in a later post)