That's where purple shampoo, which is kind of a "toner ... Enhancer Toning Shampoo No.4P Blonde Enhancer Toning Shampoo Olaplex's No. 4 Blonde Enhancer Toning Shampoo boasts a highly concentrated ...

Based on color theory, blondes should use purple shampoos, which is one type of color-depositing shampoo. As the name ... smells great post-shower. It has a 4.6-star average rating from over ...

Try using your shampoo as a more intense treatment ... while protecting your hair colour tone with this Olaplex No 4 update. Enriched with purple toner pigments, it promises to leave blondes ...

There's no need to lose your cool (pardon the pun), though, as that's when the best purple shampoo swoops ... So the idea of a toning shampoo with the Olaplex technology inside is mind-blowingly ...