Brown complementary colors

Quick answer：

Complementary colors are pairs of hues that are directly opposite each other on the color wheel. For brown, which is a neutral color, it does not have a true complementary color. However, brown can be seen as complementary to a color that contrasts with its warm or cool tone. For instance, if brown is perceived as a warm color, its complementary color might be a cool blue, and vice versa. The concept of complementary colors is rooted in color theory and is used in art, design, and color psychology.