Buddy it's called color balance. I would think he used at least 6 to 7. Well that is the way I do mine anyways.... Nice sig.
go to tutorial section..and look at the way u make multicolor sigs...that should be able to make one like this..but then ofcourse u need to have the skills n e ways...wicked sig man...looks perfect!! love the colors..
hhhmm....multi coloring. i never thougt it would look so good. 9/10 just because im not used to seing multicolored sig that good