The Best (and Not-So-Best) Purple Shampoos I've Used to Keep the Yellow Out of My White-Blonde Hair. Unless you’re into throwing money away, ditch the light-purple shampoos and conditioners. You want a seriously pigmented purple.
LUSH Daddy-O purple shampoo for blonde/gray hair. This is one of the best purple shampoo's I have ever used, and the fact its all natural, vegan friendly and no animal testing makes buying it even easier! I prefer to use it once to twice a week just to keep my blonde fresh.