Awasome Hair Color Level System 2023. Like we said, there are generally 10 hair color levels that range from darkest to lightest — the higher the number, the lighter the shade. Dark brown hair level 4:

And that means your roots will be noticeable sooner. In other words, it has to do with the lightness or darkness of the color. Web the most commonly occurring hair color in european hair is typically level 6 for france, and level 7 for north european countries.