[@xXSINXx] I feel like giving users that option would be a little excessive. 

Currently, GMs and co-GMs do get their own "corner banner" which is a different color.

But if users get the chance to change their colors regarding their username, I feel like it would serve little purpose and just make people demand other colors. Personally, I don't see the usefulness in letting people customize a color when they can change their avatar and signuate already for personalization. 

I think if you participate in a Content, you do get your user title in a new color or some other nifty code. I may be wrong, it may just be a trophy, but giving winners who have earned a standout color/trick is a way to encourage contest participation without seeing a flood of bright colored user names. Perks like that should be incentive for writers in my mind, since there are other ways to show your style.

And considering you mentioned wanting to go "from blue to hot pink" (which would hurt my eyes) I think the constant changing of colors would just look messy. I also think new users might get confused if they join and assume one color is a type of moderator while another type is just a normal user (since some forums do color code their staff).