Plutonium

H3X1C I understand that those numbers are corresponding to colors, but in game name runs through plutoniums profile (mines GOLIATH) but if i put the symbol and numbers infront of my plutonium name it says those characters arnt allowed.

Is there a way to get a colored name? i see people with colored clan tags (still dont know how to do that) and was wondering if theres a way to get a name like that?