Chromatics color line by Redken is a salon exclusive formula that is oil-based and ammonia free. A non-ammonia color is both odorless and less harsh on your hair and scalp. This is the perfect solution for those of you with a sensitive scalp that may be itchy or burn during/after the coloring process. Chromatics is 2x fortified to help protect hair during a color service. Chromatics is also 4D multi-dimensional which means your hair color will never look flat or dull. Chromatics will bring out your natural looking low and highlights throughout the lengths of your hair in this unique one-step color process. The vibrancy of Chromatics is amazing, it.