she could see a difference in the tone of her hair. The natural highlights tend to turn yellow, and this formula restored them back to their original tone. Not only is it the most powerful purple ...

As the name suggests, purple shampoo uses violet pigments to tone and neutralize hair, allowing it to counteract unwanted brassiness and yellow/orange hues that can develop over time, according to ...

Andie MacDowell's secret for maintaining her vibrant and voluminous gray locks is in this under-$20 L'Oréal Paris purple shampoo and conditioner set.

"Purple shampoo neutralises the yellow in blonde hair, leaving a creamy to ash result," explains leading colourist and celebrity favourite, Josh Wood. "This is because yellow and purple sit ...

allowing it to quickly zap any brassy yellow tones and leave strands looking ashy and cool. Pureology know that whilst purple pigments will neutralise brassiness, they won't keep your hair healthy ...