| If the rest of your hair is dyed black, there is really nothing you can do that won't ruin your hair, to get rid of it.
If your willing to spend the time and the money - you can go to a beauty salon and have it bleached out - however I don't strongly reccomend this, only because it poses such a threat on your hair's health. Most times when your hair ends up black, you have to wait until it grows out enough to dye it again. |