Shampoo 33.8 Oz Details: Seeing red? Enrich dark bases with Dark Envy - Our first range that neutralizes red undertones in virgin and all-over black to dark brown hair color. Matrix Dark Envy Shampoo is a green color-depositing toning shampoo that enriches dark bases and neutralizes red undertones. Key Benefits: Vegan Formula For virgin and all-over black to dark brown hair color Neutralizes red undertones Leaves depth and cool, glossy finish Combination of blue-yellow direct dyes Signature fragrance of citrus, jasmine and cedarwood What Causes Red Undertones In Dark Bases? Red undertones in dark bases can be caused by sun, water/chlorine, bleaching/highlighting, and chemical processes or excessive use of hot tools. How Does Dark Envy Green Shampoo Differ From Brass Off Blue Shampoo & So Silver Purple Shampoo? Dark Envy contains direct dyes that help neutralize red undertones in hair levels 1-4. Brass Off contains direct dyes that help neutralize orange undertones in hair levels 5-7. So Silver contains direct dyes that help neutralize yellow undertones in hair levels 8-10+. Mask 16.9 Oz Details: Our highest concentration of direct dyes to combat unwanted red tones. Our Dark Envy green toning mask leaves hair nourished and radiant.