printing two or more colors without over-lapping the colors - this differs from process color which blends four colors to produce a very broad range of colors.
Using one ink to represent one color as opposed to percentages of process color. Also, spot color.
A simple Test Pattern in the form of a color or grey level background (e. g. 75 % Red Field). The Flat Color Field s are useful to check CRT color purity, or Hanover bars in a decoded PAL picture. Synonyms: Flat Field