Single-color matching, universal matching

Quick answer：

Single-color matching, also known as monochromatic matching, refers to the practice of combining different shades of the same color to create a harmonious and balanced look. It is considered a universal matching technique because it is versatile and can be applied to various fashion and interior design settings. The concept of universal matching suggests that by focusing on a single color scheme, one can create a cohesive and stylish appearance without the need for complex color combinations.