Put \#[HexColor]\
before the text in your name you want colored.
For example, I typically use \#FF0000\RPG
, and that would make my whole name red, rather than the blue it would be otherwise.
Now, if I wanted it colored multiple colors - say I wanted the R to be red, the P to be bright purple and the G to be Green, I'd do something like \#FF0000\R\#BF40BF\P\#00FF00\G
I hope these examples will help you understand.