MATRIX Blue Shampoo Brass OffMATRIX Total Results Brass Off Shampoo neutralizes brassy tones while refreshing your hair with cool tones. Best for brunettes that lighten their hair, deposits neutralizing blue violet pigments to reduce brassy tones. Can be left on hair 2 3 minutes for added toning. HOW IT WORKS Wearing suitable gloves, apply Brass Off Blue Shampoo to wet hair, lather and rinse well. Leave on 3 5 minutes before rinsing. Follow with Brass Off Conditioner. Use shampoo