Review (5/5): Amazingly bright and long lasting color, but basically permanent
This hair color does NOT fade back to your bleached/original state. It will go to a few shades brighter than Cupcake Pink, aka still too dark to dye a light pink over. I have tried to dye cupcake pink over completely untouched atomic pink hair (I let it grow out for almost a year in hopes of fading back to bleached state) with no use. I refuse to bleach over my bleached hair or use color remover products, so my only hope in removing this color is by dying over it with a darker color. SFX Blue Mayhem becomes an indigo color when applied over faded atomic pink, and fades to a grayish blue, so that experiment was a success. Even after half a year of not being redyed, Atomic Pink still glows under UV light, although it's a very faint glow.