OKay so my hair is sort of a dark brown but not too dark and um I'm going blonde but I want to go black but I don't know cause my sister got her hair dyed black and she's naturally a red head and she had to get all her hair cut off D: I don't want that to happen to me.. I have long hair... so my question is if I get black will it fade quick and if if doesn't , is there any products that will work to help it fade? XD Thank yew!