KEEP MY COLOUR BLONDE SHAMPOO is a specifically formulated shampoo perfect for any blonde - natural or not! To fight brassiness, the shampoo uses a blue base with ext. Violet 2. While boosting blonde tones, soy proteins and wheat proteins strengthens hair and adds volume. This nutrient-rich shampoo is essential for anyone after the cool tones of the iconic Aussie blonde. Now in a NEW sulfate-free formula.