Blue shampoos replace orange undertones with cooler brown shades. We tested the market leaders in our beauty lab to find the best for brunettes. Shop now.

The best purple shampoo can prolong the brightness ... diminish your expensive dye job. They can turn hair a sad, dull, brassy yellowish color. The same goes for people with naturally blonde ...

The extra time was worth it—the shampoo worked so well to counteract the brassy tones of her hair that she felt more confident in the weeks leading up to her next color appointment. That said ...

From neutralising brassy tones in blonde hair to boosting ... Banish unwanted warm red tones from brunette and dark coloured hair with this cleansing blue shampoo. It gently neutralises red ...

I have dyed my hair every color under the sun, so I know a good shampoo for color-treated hair has a lot to get right. I want one that preserves my new color and undoes some of the damage that ...

Except when brassy tones creep in and ruin ... "If you leave a purple shampoo on for too long, your hair will have a blue-purple tinge to it," Irwin cautions. Never exceed the specific product ...