What Causes Brassy Hair? "Brassy hair is caused by color that lacks a grounding tone, such as brown or beige," says ...
"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.
Aveda Blonde Revival Purple Toning Conditioner My previously box-dyed blonde color was always brassy and yellow, so avoiding that was essential if I was going to keep my hair a lighter shade of ...