I've only made a couple different colors so far. The Bureaucrat color(mine even though I don't have the rights yet) and the Chat Moderator color which is green. These will be the same color for everybody in that catagory. When we have them there will be a set color for all of the following catagories.
Bureaucrat --- which is light blue
Admin --- Yet to be determined
Rollback ---- Yet to be determined
Chat Moderator --- Green
All of them will have a light blue border.