The process of neutralizing brassy or yellow hues in lightened or blonde hair utilizes color theory to achieve a more balanced and aesthetically pleasing tone. This often involves the application of products containing violet or blue pigments, which counteract the unwanted warmth. For example, hair that has been bleached to a level where yellow undertones are prominent can be treated to shift the color towards a cooler, more neutral blonde.
Counteracting unwanted warmth improves the overall appearance of the hair, resulting in a more polished and refined look. Historically, methods for achieving this have evolved from using natural ingredients to the development of specialized chemical formulations. Modern techniques provide individuals with a wider range of options and improved control over the final result, minimizing damage and maximizing color accuracy.