My hair's a chestnutty brown sort of colour xD. In the past I've dyed it a darker brown (that people mistook as black) and later it did dye it black when going through a weird emo phase. But then I got tired of having to touch up my roots so I just left it to go back to my natural colour. I've put red streaks in it before too which was pretty cool. And I tried doing green streaks aswell but they didn't work.
Apparently, according to my mother, my hair started out as blonde, then it fell out and grew back dark. xD Not sure why, but it did.
I don't really mess around with my hair much any more.