Yes, i dye mine all the time. It's black at the minute. But i've had it dark brown, light brown, red, blonde, purple, highlighted . . . It's naturally dark blonde. I think i'll leave it like it is for now though.
It's currently very nearly grown out completely now. I would say it's dark blonde atm, whereas naturally it's very blonde. But obviously there's no sunlight to lighten it.
I'm gonna help it along in the process and dye it a a bit blonder soon though.
Yeh, I think I've had every possible shade of blonde and brunette over the years (naturally a light brown), also had red twice (although once was a mistake) and plum.