Harmony Cherry Mahogany Temporary Hair Colour x3 This lisiting is for 3 hair colours Professionally formulated, ammonia free Mahogany temporary hair colour that will not lighten your hair but will give you a natural, expert looking well-conditioned finish. Easy to use, Harmony Mahogany helps to improve, lift and deepen the colour and condition of your hair, making it look richer, sleeker and shinier. Natural highlights come alive with a subtle glow of colour. Conditioning Temporary Hair Colour. Wash In, Wash Out. Lasts up to 6-8 washes. No ammonia. Vegan.