colour harmony, n.All

Colour harmony (n.) as ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠a theory would group colours, forbid some combinations and allow others, giving its rules no justification, as in musical harmony.