What method involves applying color from scalp to ends in one step?

The method that involves applying color from scalp to ends in one step is all-over color. This technique is designed to provide a uniform color throughout the entire hair, ensuring consistency from the roots to the tips. This approach is particularly useful for achieving a solid base color, whether the desired outcome is a vibrant look or a more natural shade. The application is typically straightforward and can be performed in one session, making it efficient for both the stylist and the client.

In contrast, highlights are used to create dimension by lightening specific sections of hair, often leaving other parts darker. Balayage is a free-hand highlighting technique that creates a more natural, sun-kissed look by applying color in a sweeping motion, which usually results in a graduated effect rather than a uniform color. Ombre involves a gradual transition from a darker color at the roots to a lighter one at the ends, which again does not fit the criteria of a solid color application from scalp to ends. Therefore, the concept of all-over color is clearly defined by its single-step approach to achieving a cohesive shade throughout the hair.