- Enhances blonde tones and reduces yellowing of gray-, lightened, highlighted or natural blonde hair after just one use. Illuminates blondes and fights yellowing of lightened, highlighted, natural blonde, gray or white hair after just one use! Made with AHA structure complex: Lactic Acid, Malic Acid – supports internal reconstruction, Polyquaternium-6 – evens out the hair surface, and HC Blue No. 11 – blue direct dye to counteract yellowing. For all hair types. Lather, rinse, and repeat if necessary. Follow with your chosen conditioner.