Color Charm is the haircolor that makes sense. It is easy to understand and formulate. Color Charm is: Dependable: Long-lasting, brilliant color results. Predictable: The color you want is always the color you get. Consistent: Guaranteed gray coverage. Reliable: 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.