Recently I decided to go from dyed black hair (it's naturally dark brown) to blonde.
Yeah that didn't really work out. The parts where the dye washed out got super super light and became the color I wanted, but then the bottom parts were a dark red/orange where the color started to lift but then stopped.
Oh god it looked AWFUL.
So a few days later I went and got it dyed dark red to match the dark parts, and I've since gotten it trimmed, but you can still see the darker parts where the bleach didn't work.
I've heard green is an absolute bitch to work with in hair because it washes out badly. Maybe you could cover it up with some blue if you still want the color without bleaching?
Or you could just get a box of dye at a drug store in a dark brown. I'd suggest black but then it's nearly impossible to get out, as I've discovered.
Also I once dyed my hair bright orange with Kool-Aid, the color stayed longer than any dye I've used, it was cheap, and it smelled amazing and left my hair feeling like silk.
