RGB color is the mainstream in tools and software on the web, CMYK is the mainstream in printed matter, but the first three primary colors learned at school are RYB color model of red · yellow · blue.

RGB (short for Red, Green, Blue) An RGB color space is any additive color model. The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems ...

What is the Young–Helmholtz Theory? The Young–Helmholtz theory, also known as the trichromatic theory of color vision, was proposed independently by Thomas Young and Hermann von Helmholtz in the 19th ...