Is 1b40 40% black or 40% gray?

The color code “1B40” typically refers to a combination of black and gray shades in the context of toupees for men. The “1B” represents the base color, which is usually black, while the “40” indicates the percentage or amount of gray blended into the hair. In this case, it suggests that approximately 40% of the hair is gray, while the remaining 60% would be black.