In the realm of hair care, purple shampoo has earned its spot as ... It stands as a testament to how a little color theory can go a long way in perfecting our beauty routines.

Purple pigments keep gray hair bright, while silk proteins strengthen ... This triple-action shampoo pushes color pigment deep into strands for a long-lasting hue, balances dry hair and reduces ...

Color-depositing shampoos add specific pigments (either purple, blue or green) onto the hair shaft to maintain your desired color. Based on color theory, blondes should use purple shampoos ...