Ok so I used hairdye from a box. It was nutrisse I think. Anyway when I died my hair from a dark goldeny blond to supposedly light light brown it turned a shade of dark green!! I have had this happen to me before and it took at least a week or two to fade to brown with regular shampoo. What do I do??

I'm thinking that you don't have enough of a red base in the blonde to cancel out the blue in the brown.

Go to a pro if you're dead set on the brown or you can try fading it a bit with Prell shampoo or dawn dish detergent (the kind for hand washing).