Gray Magic® by Ardell is an effective and innovative way to cover stubborn, resistant gray hair and bring vibrancy and intensity to ALL hair color for long-lasting results. Don't settle for dull, flat color! Gray Magic® Color Additive can be added to ANY color formula (even non-peroxide hair color!) to achieve vibrant color and exceptional gray coverage. It's formulated to help hair color penetrate deeper into cortex. It can also be used to tone down ash (green) tones and to help alleviate chlorine discolorations. It also adds punch to red hair color formulations.