How can one achieve a primary color in hair dyeing?

Achieving a primary color in hair dyeing is best accomplished by using a single color without mixing. Primary colors in color theory—red, blue, and yellow—are the foundation of all other colors. When dyeing hair, these colors can be applied directly to create vibrant, true primary shades without the need for blending different hues.

Using a single color ensures that the original tone of the dye remains unaltered, allowing for a pure and vivid result. This technique is essential in achieving the desired vibrant look since mixing colors can lead to secondary hues or muted tones, which are not the goal when aiming for a true primary color. Hence, the straightforward approach of applying a single, unaltered color is the most effective way to achieve this objective.