**RGB** — red, green and blue — is the additive colour model used to specify colours on emitting displays such as monitors, televisions and projectors. RGB values, each in the range 0-255, define how much of each primary is mixed to produce a given hue. RGB is the digital counterpart of CMYK and is the natural specification for the on-screen reproduction of a flag.
**Example**: The pure red of the flag of Switzerland is given in many specifications as RGB 255 0 0.
**See also**: [hex](/glossary/hex/), [cmyk](/glossary/cmyk/), [pantone](/glossary/pantone/), [tincture](/glossary/tincture/)