The steps involved in determining a Color Reproduction Index are described. The Index is based on differences in Hue, Lightness, and Chroma (or Colorfulness), as evaluated by a model of color vision, for a reference and a test situation in which the viewing conditions may be different. The color quality of reflection prints made at different printer settings was evaluated by means of the Index and by observer judgements, and a reasonably good correlation was obtained.
Michael R. Pointer, Robert W. G. Hunt, "A Color Reproduction Index" in Proc. IS&T 2nd Color and Imaging Conf., 1994, pp 180 - 182, https://doi.org/10.2352/CIC.1994.2.1.art00049