H19- True Violet, What it is: L’Oreal Technique - Excellence HiColor collection delivers true-t- tone, profound color results on dark hair. The hair color collection represents a unique and new color pallet for HiColor and will appeal to you if you love vibrant and bold hair colors such as Violet, Blue, and Plum. What it does: HiColor by L’Oreal is a permanent hair dye that is specifically formulated for dark hair. The HiColor collection shades provide a multi-level lift on dark hair in one easy step with no brassiness. It is also formulated with an Anti-Breakage Ceramide R Complex. What else you need to know: The HiColor line shades are mixed in a 1:1.2 ratio with Oreor Crème Developer 30 volume (20 volume for relaxed hair). Application and processing time is 30 minutes (at room temperature).