A hair color wheel toner is a type of hair dye used to correct or enhance the tone of existing hair color. It works by adding or subtracting certain pigments to the hair, resulting in a more natural or desirable shade. For instance, a green toner can be used to neutralize red tones in hair, while a blue toner can be used to cool down brassy tones.
Hair color wheel toners are essential tools for colorists, as they allow them to create a wide range of customized shades. They can also be used to fix color mistakes or to refresh faded hair color. One key historical development in the use of hair color wheel toners was the invention of the color wheel itself, which provides a visual representation of the relationships between different colors.