Schwarzkopf Goodbye Yellow Neutralizing Shampoo is the first anti-yellow wash that is highly pigmented. This wash, which is free of SLS and SLES sulphates, counteracts and neutralizes underlying warm tones with a gentle cleansing action and an instant tonal deposit. Purple and blue direct dyes are a special pigment combination that is designed to gently cleanse hair and neutralize unwanted yellow undertones. A pH of 4.5 is added to the formulation to ensure an efficient and durable outcome.