As part of one Wella's finest permanent hair colour ranges, Koleston Perfect, Wella Koleston Perfect Hair Colour 33/55 Dark Intense Mahogany Brown offers you prestige colouring results whilst carrying an aura of elegance. Whilst delivering vitality to the hair, it will leave your locks with a very distinctive glowing shine that lasts. With 100% grey coverage, your hair will look naturally stunning. Wella Koleston Perfect Hair Colour 33/55 Dark Intense Mahogany Brown uses an intense formula which creates vibrant luminosity of the Vibrant Reds shade. Using Triluxiv technology which operates through 3 phases, the first being Colour Navigator which prepares the hair for outstanding colour results by depositing lipids onto the porous areas. Secondly, the Colour Intense phase where the high density colour molecules combine with the HDC activator to enable the most intense, evenly balanced colour development. The third phase is the Shine Guard which gives your hair a lipid-based film to coat and protect your hair whilst illuminating it with vigorous shine. When using Wella Koleston Perfect Hair Colour 33/55 Dark Intense Mahogany Brown, please consult instructions, the Wella website or a professional for the best results. Ask your professional hairdresser for an in-depth colour consultation to help determine your perfect shade.