Kérastase Blond Absolu Anti-Brass Purple Shampoo This Kérastase Blond Absolu Anti-Brass Purple Shampoo ($35) also neutralises any undesirable brassy undertones as you shampoo (similar to the toning process in a salon that adds coolness to more yellowy shades). It also softens with edelweiss flowers, and several Sephora reviewers note that it leaves their hair less dry after washing. For a shampoo that can be used daily, there's also this Kérastase Blond Absolu Hydrating Illuminating Shampoo ($35) is a clear formula to nourish and cleanse blond hair. Image Source: sephora.com Kérastase Blond Absolu Anti-Brass Purple Shampoo $35 from sephora.com Buy Now Kérastase Blond Absolu Hydrating Illuminating Shampoo $35 from sephora.com Buy Now