The Free On-line Dictionary of Computing (30 December 2018):

Pantone

    A set of standard colours for printing, each of
   which is specified by a single number.  You can buy a Pantone
   swatch book containing samples of each colour.  Some computer
   graphics software allows colours to be specified as Pantone
   numbers.  Even though a computer monitor can only show an
   approximation to some of the colours, the software can output
   a colour separation for each different Pantone colour,
   enabling a print shop to exactly reproduce the original
   desired colour.

   (1996-03-23)