Proximate complementary complementary

Quick answer：

The term 'proximate complementary' in the context of color theory refers to colors that are close to each other on the color wheel and appear complementary when combined. The concept of complementary colors is based on the contrast in hues. For example, red is complementary to green. The phrase 'complementary complementary' seems to be redundant, as 'complementary' is used twice. In color theory, this would be a misunderstanding, as complementary colors are pairs that contrast with each other, not colors that are close together.