A color system developed by Albert Henry Munsell between 1902 and 1914 (A color notation; Munsell’s color atlas), whose fundamental variables are the psychological chromatic attributes “hue”, “value” and “chroma” (equivalent to hue, lightness and saturation). The system considers these variables as gradients scaled in ten values (degrees of clarity), ten shades (degrees of hue) and ten “chroma” (degrees of chroma; from null to “Munsell’s maximum chroma), as shown in the image [4]. It is one of the most important systems of color sorting, from the scientific, technological and iconolinguistic perspective of color [5]. The color chart of this system is used by agronomists and foresters, among others, for chromatic measurement of soils and rocks [6].

The acronym CMYK –primary colors cyan, magenta, yellow, and black (K) ink plates– corresponds to a subtractive color model used for color printing. Printers work with this model because they achieve almost all the colors of any print using only these four inks by printing overlapping layers (9).