Colorlast purple shampoo by biolage. Neutralizing purple shampoo for blonde hair. This purple shampoo is the most natural alternative for maintaining a cool blonde tone without a trace of yellowish undertones. Its fig and orchid-based formula neutralizes unwanted tones that tend to appear on blonde hair after shampooing, to maintain a flawless mane for longer. Furthermore, it also has hydrating and anti-breakage properties that minimize the aggressiveness of discoloration, promoting soft and shiny hair. Vegan formula. It does not contain parabens.