Special Effects atomic pink is what you'll be wanting. You will have to bleach first to get it to hold, but once you do that shit isn't just a dye, it's a commitment. It will not easily go away, even if you want it to, and some people have found that dyeing a normal color on top makes it look muddy (I've been fortunate, I haven't had that happen).

But the color is seriously amazeballs, and you can also dilute the hell out of it if you want a lighter pink.