Blacklight’s Blue Shampoo’s professional formula is stronger than the retail formula for better tonal control. is shampoo is formulated for highlighted, bleached, white and natural blonde hair, eliminates brassiness and refreshes faded highlights leaving hair looking cleaner and brighter. Its unique formula, enriched with 11 amino acids and argan oil, moisturizes, strengthens hair structure and repairs surface damage while increasing shine and colour retention. Sulfate, salt and paraben free.