This Anti-Yellowing Purple Shampoo by Shu Uemura is specifically formulated to neutralize unwanted brassy or yellow tones in blonde, silver, or color-treated hair, maintaining cool, vibrant color longevity. Its targeted action helps restore pure, cool reflected tones, leaving hair looking refreshed and professional salon-quality between appointments. Apply as needed to damp hair, lather, wait, and rinse thoroughly for optimal color correction.