Are the three primary colors red, yellow and blue or red, green and blue?

The three primary colors are red, yellow and blue.

Three primary colors refer to the basic primary colors of color optics, namely red, yellow and blue. These colors can be mixed to produce other colors, because they are the basis of color mixing. Red, yellow and blue are traditional primary colors, which are used for painting and printing. On the other hand, red, green and blue (RGB) are the three primary colors used in electronic display and digital image processing, but in color optics, red, yellow and blue are still the traditional three primary colors.