Color harmony in the color wheel

Quick answer：

The concept of 'color harmony in the color wheel' refers to the arrangement of colors in a circular pattern, known as the color wheel, where colors are grouped based on their chromatic relationships. Adjacent colors on the wheel are those that are next to each other and share a common color base, such as red and red-orange or blue and blue-green. This arrangement is based on the color spectrum and is used in art, design, and fashion to create aesthetically pleasing combinations.