Gentle shampoo with optimal pH 4.5 level to perfectly freeze color pigments and preserve intense hair color. Colour Safe Shampoo This colour safe shampoo helps preserve colour in your hair and prevents colour from fading fast. The shampoo minimises the amount of colour that washes out of your hair and down the drain each wash. Use shampoos that suit your hair to minimise your salon visits and keep your out-of-the-salon look for longer!