My hair is atomic pink and has been for a few months. It's dyed over bleached hair and hardly fades.

Anyways, I was thinking of going cruella deville-ish, not black and white but light blonde and coffee-black/brownish.
I know I can just put a dark brown dye on one side to achieve that color but how do I get the pink out on the other side, to go blonde? I know atomic pink is almost impossible to get rid off and I've bleached it a few times and it hardly lifts the color. I use the strongest bleach I get over here. (Schwartskopf extreme blonde 5-7 shades lighter or something)

So...how? Is it stripper - bleach - toner? Is it even possible or will I have to grow the hair out before I'm able to go blonde?

you might try l'oreal color zap. dont know how useful it is on un-natrual colors but it took me from black to blonde in 2 hrs

You could also try toning it with the complementary color. For atomic pink, which I think is red with a touch of blue, you'd probably have to put in turquoise with a touch of green. You can probably get a dimmer, but more neutral shade this way.

Note though that if you use a toner that doesn't have lasting power, you'll fade back to a muddy pink.

Definitely stop bleaching your hair, though. One time, I turned mine into broken shards of straw and only got half of atomic pink out.

Loreal Color Zap works great on faded atomic pink. It faded almost all of the color out when I used it, but not completely.
However, at that point it's pretty much so light that another color will cover it with no problem. I would just stay away from a light green, since the little bit of pink that's left might turn that muddyish.

Ok, thanks everyone :) How light blonde will I be able to go, you think?
Aiken, do you mean that I should dye it first, and then bleach it? Or bleach then dye?

hakusa--

I meant that if you've bleached it as far as possible and it's still not blonde, that's when you should consider toning with a complementary color. So yes, bleach first. If you tone first, the bleach will just take the tone back out.

Won't that just make it light purple? :P

Nope. Toner is only purple when you're toning yellow/gold. To neutralize/tone atomic pink, you'd use the opposite color on the wheel, which I think would be sort of a greenish turquoise.

It's not necessarily the best way to hide color, but it's a better last resort than utterly destroying your hair with tons of bleach.

What I meant was won't dying your hair with turquoise just kindof make the hair another color and not necessarily lighter? 8)

I have a question closely related to this one. I have been dying my hair w/ Special Effects Electric Blue for over a year now. Until recently, I've just kept it short, so what little remained of the previous round's dye didn't matter. I've now begun to grow it out, but this means I have about 8 inches of stubbornly pink hair. Last time I bleached my roots and added blue all over, the roots were gorgeous, as usual, but the length was immediately purple. Very sad. Would a greenish-turquoise be appropriate to balance the pink here, too?
I last dyed it in early July, and yes, if you wait long enough, Electric Blue will be pink.