GOODBYE YELLOW with Integrated Bonding Technology. Neutralizes unwanted yellow undertones while gently cleansing the hair. BENEFITS. The calibrated pigment combination of purple and blue direct dyes is formulated to neutralize unwanted yellow undertones while gently cleansing the hair. Intensive care for pre-lightened bases through Bonding Technology. Vegan Formula and free of SLS/SLES Sulfates (SLS/SLES Sulfates = Sodium Lauryl Sulfate & Sodium Laureth Sulfate). Quick & easy to apply at the backwash. TECHNOLOGY. GOODBYE YELLOW highly pigmented wash for instant tonal deposit to counteract and neutralize underlying yellow tones on medium to light blonde hair. Gentle cleansing with integrated Bonding Technology. HOW TO USE. Apply pure and allow eye control, leave in for up to 5 minutes.