Shop › Pureology Strength Cure Blonde Shampoo Image 1 of 1 Pureology Strength Cure Blonde Shampoo from $37.45 Deep purple shampoo that tones down brassiness and strengthens damaged hair. Size: Select Size 9 oz Liter Quantity: Add To Cart Added! Deep purple shampoo that tones down brassiness and strengthens damaged hair.