In hair coloring, what does using complementary colors result in?

Using complementary colors in hair coloring is primarily a technique for neutralizing undesired tones. Complementary colors are those that are opposite each other on the color wheel. When applied to hair, they can effectively cancel out or diminish unwanted hues. For example, if someone has unwanted yellow or brassy tones in their hair, using a purple toner (which is complementary to yellow) can help neutralize those warm hues, resulting in a more balanced and aesthetically pleasing color.

While enhancing brightness, reducing damage, or having faster application times may be desirable in hair services, they are not the primary purpose or result of using complementary colors. Enhancing brightness might involve adding lighter colors or highlights instead of applying complementary shades. Likewise, the speed of the application and minimizing hair damage depend more on the techniques and products used rather than the concept of color theory itself.