Matrix Colorinsider Precision Permanent Hair Color for Unisex, No. 4RV Dark Brown Red Violet, 2 oz

What is this product? Maximum color impact with a color palette of accuracy. The only technology which directly injects oil into the color of the fiber core. More info: With a palette of tones composed of a wide range of tones: 15 families, 50 tones plus CLEAR. Predictability and perfect balance and reflexes bases without extra coverage tones. Results in high definition color, with a gloss uniformity, optimal coverage of white hair.