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 ...

Shampoo may be a staple hair care product, but not every formula is designed to meet the unique needs of gray hair. The best ...

That’s where color-depositing shampoo (think purple shampoo) comes into the picture. Believe it or not, color theory is a big part of finding the right color-depositing shampoo for you — you ...