CMYK , Pantone , RGB and RAL are four distinct colour systems used throughout all design , printing and painting.
CMYK
Used mainly for printing processes , cyan , magenta , yellow and black. 4 plates are used in the printing press and the colours are mixed up. Dots on newspapers are registration marks to line up sheets.
RGB
Used for screen and electronic devices , the colours are formed used 3 light beams of various intensity. If all were combined then would create white.
Pantone
Used in printing , can be specific for a distinct brand colour. It ensures that there is consistency of the brand colour throughout all printing and reproduction
RAL
It is used mainly for powder coating varnish and plastic colouring. Used for painting items in your brand colours such as physical items like business assets.
monochromatic
analogous