What is a purple shampoo? A purple-colored shampoo contains purple pigment to neutralize brassy and yellow tones on lighter hair. "The main reason it is purple is because on the color wheel, it is the direct opposite color of yellow, which means purple and yellow will cancel one another out," explains Kandasamy.

Does purple cancel out yellow?

On the color wheel, purple is the opposite of yellow, which is why purple pigments cancel out brassy, yellow tones. When you get your hair professionally colored at the salon, hairstylists often tone hair to neutralize brassy yellow and orange tones on bleached hair.

Will purple cover yellow hair?

If your hair is yellow-toned blonde and you want your Aquamarine to stay on the blue side, try adding a small amount of Purple Rain! This can help to neutralize yellow or orange tones and will get you a cobalt blue shade! ... Purple Rain covers just about everything!