noun
three primary colors
Refers to the three fundamental colors used in color mixing: red, green, and blue for light (RGB), or cyan, magenta, and yellow for pigments/printing (CMY).
光の三原色は赤、緑、青です。
The three primary colors of light are red, green, and blue.
絵の具の三原色を混ぜると、さまざま
By mixing the three primary colors of paint, you can create various colors.