Instantly neutralizes brassy and yellow tones for blondes and gray hair. Repairs and protects color-treated hair. This unique, color-correcting formula preserves cool blondes and silvery grays – banishing unwanted yellow, warm tones while protecting vibrancy. Powerful ingredients strengthen and defend hair against the elements. Instantly neutralizes brassy and yellow tones for blondes and gray hair. Repairs and protects color-treated hair.