put head and shoulders conditioner on and leave it for an hour. Keep washing your hair and go out in the sun as much as possible. When I dyed mine black putting more colours on led to a buildup of dye and really damaged my hair had to get it cut really short
it should wash out faster with cheap shampoo. My daughter used dishsoap and it made it fade out over a few weeks time.Fading black hair dye
You could try a SALON-PERMANENT colour, (a light, light brown) and then, because of the black dye it will go a colour in between. :)Can I dye my hair black with blue tint?