- For warm tones. Illuminate and intensify bold brunettes with this colour enhancing shampoo, blended with horse chestnut extract and fuelled by warm toners, for sharp colour and impeccable shine. Leave in for 3 to 10 minutes depending on the desired effect. Can be used daily. For warm tones. Magnifies depth and richness for intense glossy warm tones. Lightweight conditioning helps improve smoothness. Hair looks glossy and healthy.