Amika Bust Your Brass Cool Blonde Shampoo This popular Amika Bust Your Brass Cool Blonde Shampoo ($12-$20) tones out overly warm shades in natural and dye-aided blondes. Hair is fortified as it's cleaned as this shampoo includes nutrient-packed avocado oil and shine-boosting wild cherry bark extract. Image Source: sephora.com Amika Bust Your Brass Cool Blonde Shampoo $12 from sephora.com Buy Now