Review (5/5): Not for blue/green/purple fantasy colors
It will lift oxidative hair dye (the type you mix with peroxide) but will not damage your hair. Do not expect your hair to look the way it was before you dyed it- nothing will. This will only shrink the color molecules of the dye to be then washed away. Fashion colors (neon, hot pinks, blues & greens) are NOT oxidative colors. There are color removers for those (usually citric acid based). Hair processed will always take (absorb) more color because it's porous. Be careful re-coloring your hair after.