Ardell Gray Magic is a unique way to cover resistant gray hair, and bring vibrancy and intensity to ALL hair color. Gray Magic Color Additive can be added to ANY color formula to achieve vibrant color and exceptional gray coverage. Formulated to help hair color penetrate deeper into cortex. Is also great for toning down ash (green) tones. Adds "punch" to red hair color formulations and helps to alleviate chlorine discolorations.