What does "primary color" mean?

Any of three colors which, when added to or subtracted from others in different amounts, can generate all other colors

Primary color

Common synonyms include: base color, basic hue, basis color, dominant color, fundamental color, halftone.

noun

noun ·Rare ·Advanced level

Noun

1
Any of three colors which, when added to or subtracted from others in different amounts, can generate all other colors
"Red, blue and green are additive primary colors."
2
any of three colors from which all others can be obtained by mixing wordnet

"Red, blue and green are additive primary colors."