Color Tattoo!!

Okay so I have been thinking about getting a white tattoo, however I'm kind of nervous and don't know if I should, because of the fact that I could be allergic to color tattoos. I'm allergic to almost all metals so it's hard for me to find earrings, and it's also I have to be careful of certain things that I put of my skin because I get breakouts and rashes. People have been telling me that, because of these things, that color tattoos may not be for me. I have one black tattoo. Are any of you allergic to color tattoos? Or have any advise for me on anything to do different with color tattoos?