What Causes Brassy Hair? "Brassy hair is caused by color that lacks a grounding tone, such as brown or beige," says ...
Instead, these are hair dyes uniquely formulated for graying and meant to return you to your previously natural color.
"It neutralizes the brassy tones that occur when lightened ... While blue shampoo is recommended for color-treated brown hair, natural brunettes can also benefit from its unique formula.
"It neutralizes the brassy tones that occur when lightened ... While blue shampoo is recommended for color-treated brown hair, natural brunettes can also benefit from its unique formula.