- Deposits blue-violet pigments to neutralize brassy tones. Color depositing formula boosts cool tones. Protected Color. Professional Care. Get Up to 10X less breakage with Matrix's most neutralizing system when using the Brass Off system of shampoo, mask and leave-in cream vs. non-conditioning shampoo. Apply to wet hair, lather and rinse well. Leave on 3-5 minutes before rinsing and follow with Brass Off conditioner.