Ultra violet is a super cool, blue-toned violet hair dye that can even give Unbleached hair violet tones. For the most vibrant results, we recommend lightening hair to very light level 9 blonde or lighter before use. Benefits of conditioning hair, resealable tub for longer use, comes with instructions. Maintain color by washing with a sulfate-free color safe shampoo & conditioner, using cool water. The more often you wash, The faster the color will fade out.