Color Charm is the haircolor that makes sense. It is easy to understand and formulate. Color charm is long-lasting, brilliant color results. The color you want is always the color you get. Color results are true to tone. Color charm provides new, easy to use level & base shade numbering system. Mixes smoothly each time to allow for quick and easy application. Economical 1:2 mixing ratio. Up to two re-touch applications per tube.