"To remove the hue, switch to regular shampoo for the ... Firstly, it works to neutralize yellow tones. "This is because purple is the opposite of yellow on the hair color spectrum," says Papanikolas.

This video captures the process of turning yellow-toned hair into a striking purple, using bleaching and coloring techniques to achieve a bold transformation. The journey from lightening to ...

Because purple is opposite on the color wheel from yellow, the best shampoo for fighting brassiness is purple. These shampoos use a crushed violet pigment in order to get this brass-toning color.