I think I've had every colour known to man, though I'm from Australia so I usually use something called fudge. I've had green, orangey red, marooney red, blue, purple, pink, black, blond. About a year and a half ago I had a mohawk, but many people kept bugging me to make it more 'normal' for my wedding, so i got chin length extensions and dyed it black.
Here's one from 2003, it's my natural auburn colour but the most stylised cut I've ever had:
my mohawk before it got dyed:
this is my pink mohawk stage from last year (yes, I was referred to as Pink more than once):
At the moment, the extensions have been taken out and so I have just past chin length, with the black on the ends and auburn regrowth. I'm going back to the job that allowed the pink mohawk soon, so I'm sure I can do something with it.