I am 13 years old and currently intrested in getting tatooed?

i am 13 years old and currently intrested in getting tatooed by a freind of a friend who says he can give me one for 20 bucks! I know, it sounds to good to be tru! It will be a skull and crossbones on one of my forearms. My question is what color whould I get it in? black is not original enough; thanks for your help, I know i'll be the coolest kid in my 7 grade cl :)