This brightens old hair dye and boosts its undertones as well as preventing fade and ramping up the shine. So when you wash with this particular shade of shampoo, it deposits purple pigment into ...

“Avoid purple shampoo with this colour ... This works with the natural yellow undertone of blonde hair, helping it to have the richness of nectar rather than the brassiness of yellow.

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 ...