Christophe Robin Colour-Shield Shampoo If you're trying to maintain the hair colour or highlights you recently spent time to DIY, this mild Christophe Robin Colour-Shield Shampoo ($38) includes natural amino acids to lock in dye and antioxidant vitamins to protect against oxidation that can cause unwanted colour changes. Image Source: sephora.com Christophe Robin Colour-Shield Shampoo $38 from sephora.com Buy Now