Four Harmonious Colors

Quick answer：

Four Harmonious Colors refers to a color scheme in art and design that aims to create a sense of balance and harmony. This concept often involves using colors that complement each other and are pleasing to the eye. Common examples include complementary colors, analogous colors, and split complementary schemes. In interior design, for instance, a four-harmonious color palette can be used to create a cohesive and visually appealing space.