9-grid color coordination

Quick answer：

9-grid color coordination refers to the arrangement and combination of colors in a 3x3 grid. It is often used in design, fashion, and art to create harmonious and visually appealing compositions. The most famous example is the 'rule of thirds,' which divides the grid into nine equal sections, creating a more pleasing aesthetic. The coordination of colors within these sections can follow various principles, such as complementary, analogous, or monochromatic schemes.