Tints of Nature is the only available line of permanent hair colours to use natural, certified organic ingredients wherever feasible. The highly effective formula also has a naturally derived base. It is paraben free and contains no harsh ammonia, resorcinol or nonoxynol, thus helping to ensure damage free results. Tints of Nature use extra mild, low odor, pharmaceutical grade peroxide and the lowest possible percentage of PPD pigments (Paraphenylenediamines) - ranging from 1N (the darkest) at 2.0% to 10XL (the lightest) at 0.03% - giving an average of 0.6% across the line. You can darken your hair by several shades, lighten it by 1- 1 1/2 shades, simply match or even enhance your natural color, and gently but effectively cover all gray hair. You can choose the color and Tints of Nature take care of the condition - leaving your hair soft and silky with a deep and lasting shine.