Yes you can!
I washed my hair about a day and a half after dying it...at the salon i got it done. i took a bath to test my hair and just the dye from my scalp came off. you could tell from the bath water. but yea so wait a day or two to wash your hair. and if you have dandruff the dandruff comes out what ever color you died your hair. it didnt happen to me but it was funny.
if you dont want to dye your hair, just wash your hair regularly and it will eventually come off, but the fastest results woould be by dying it to the color you want.
no it doesn't only if you use the right hair dye
You tell me
Use antibacterial soap, and scrub off the hair dye. If you dye your hair again, I recommend putting Vaseline on your cuticles and wearing disposable plastic gloves.
hair coloring is temporary you can just wash it off and it doesnt effect your hair (only if you use it every day) hair die some times can be permanent and you cant wash it for a number of weeks however it does damage your hair your hair turns whiter quickly ;)
dye it
Scrubbing and some sort of tile wash. If you scrub it directly after it gets on the tile then you can just use hot water, but hair dye is only a stain (it's not permanent) so it will come off.
cut all your hair off
First off, Gerard never dyed his hair pink, it's red. And he used Fudge hair dye, not sure what colour though.
Wash your hair of course!
use vinigar