For virgin and all-over black to dark brown hair color Combination of blue-green direct dyes End result leaves dark bases with depth & cool, glossy finish 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 Hair Mask Differ From Total Results Brass Off Hair Mask & So Silver Hair Mask? 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+.