What color is used to cancel out green tones in hair?

To neutralize green tones in hair, the correct color to use is red. In color theory, complementary colors are used to cancel each other out; this principle is especially important in cosmetology. Green is opposite red on the color wheel, meaning that red can effectively counteract or "cancel out" green hues in the hair.

When someone has unwanted green tones, typically resulting from the fading of hair color or from exposure to chlorine in swimming pools, applying red pigments can help restore a more natural or desired color balance. By understanding this relationship between colors, cosmetologists can effectively manage hair color corrections and provide clients with aesthetically pleasing results.

In contrast, blue, purple, and yellow do not address the issue of green tones specifically, as they correspond to different points on the color wheel that do not effectively neutralize green.