The best purple shampoos, according to our testers, include Amika, Kristen Ess, and IGK, and Nexxus. Our picks range in price ...

In addition, according to Papanikolas, purple shampoo will illuminate highlights on blondes and add brightness to color-treated and natural hair, ranging from gray to white shades. Begin by ...

I love Olaplex No.4P because it helps keep my highlights fresh and ... neutralise yellow tones on blonde and grey hair. If you're searching for a subtle purple shampoo, this one isn't for you.

Before using a purple shampoo, wash your hair with a clarifying shampoo. This will help remove any existing product buildup, which could prevent the purple shampoo from properly absorbing.