I had medium brown hair with heavy gold highlights. I attempted to cover them with a medium auburn permanent boxed dye. It looked like true cherry red with purple streaks. So I COlor Zap and it came back down to fluorescent orange yellow. I then covered that with a Light Amber Brown. It came out medium auburn again!
I have a box of Ion Brilliance Medium Reddish Brown and a bottle of 30 volume Sensitive scalp developer. What will that get me? I don't have any more Color Zap.