What color is used to neutralize red in hair coloring?

In hair coloring, the color used to neutralize red tones is green. This principle is based on the color wheel, where complementary colors cancel each other out. Red and green are opposite each other on the wheel, meaning that green can effectively neutralize unwanted red hues in the hair.

When working with hair color correction, understanding the color theory is essential. Red tones can arise from previous dye jobs or natural undertones, and using a green-based toner or dye can help achieve a more neutral or more balanced hair color.

The other colors mentioned, such as blue and purple, serve to neutralize other tones; for example, blue typically neutralizes orange, and purple neutralizes yellow. Therefore, while they are valuable in their context within hair coloring, they are not effective against red.