Colour

PANTONE
Specific spot ink colours, the PMS (Pantone Matching System)

CMYK

Cyan, Magenta, Yellow, Key (Black)

This describes the subtractive colour model used in colour printing. CMYK is contrasted with spot colours where specific coloured inks require their own printing plate.

RGB

Red, Green, Blue

This is the additive colour model that is used in design for screen. Only a select amount of RGB can be printed with CMYK, displayed in this colour chart