Cool Hair Color Meaning References. But how do we read this code? The tone of the hair is dependent on the ratio of black or brown eumelanin to yellow or red pheomelanin.
Find your shade home > hair color needs > hair color number guide hair color levels, tones and shades 01 what is a level? The tone, the undertone, the shade, and the level are all important when it comes to hair color. It is also available in both light and dark tones.
