Double-color color scheme

Quick answer：

A double-color color scheme is a design approach that uses two main colors to create a cohesive and visually appealing aesthetic. These colors are often chosen to complement each other or to create a particular mood or atmosphere. In graphic design, web design, and fashion, a double-color scheme can help to simplify the visual palette and focus attention on the most important elements of a design. It is a key principle in color theory and design psychology.