hue; color phase
Technical term used in color theory, art, and image processing to refer to the attribute of a color that distinguishes red, blue, green, etc.
Choose complementary colors using a hue circle.
You can adjust the hue in this image editing software.
color circle; color wheel
Compound of 色 (color) and 相 (aspect, phase). The term is a modern technical coinage for 'hue'.