Why do computer screens use RGB if red blue and yellow are the primary colours?

Question

Why do computer screens use RGB if red blue and yellow are the primary colours?

In: Other

Answer 1

There are different primary colors depending on the medium: pigment or light. Red, Blue and Yellow are the primary colors of pigment; Red (Cyan), Green and Blue are the primary colors of light. Also, in pigment, the absence of color is white and all the colors combined are black (kind of); in light the absence of color is black and all the colors combined are white.