Redken Chromatics hair color is a hair color used to fortify hair and deliver color pigments at the same time. It can cover gray flawlessly and is true to tone/color results. It is ammonia-free and odor free. It offers long-lasting color and is multi-dimensional. What It Is Ammonia-free, multi-dimensional permanent haircolor featuring with ODS² (Oil Delivery System) and Protein Extract Technology. What It Does Delivers lasting vibrancy and reflective color results, while revitalizing hair. • 2X fortified hair* • Zero ammonia, zero odor • Up to 100% gray coverage • Multi-dimensional, 4D color results