The DIN Color Chart rests on a development of more than 40 years. It belongs to a group of color order systems that attempt to show equal distances in defined color series. The choice of hue, saturation, and darkness degree as a function of relative luminance factor, and the extended use of colorimetry for interpolations and extrapolations are characteristic elements of this color system. As results of the nature of the colorimetric definitions, several compromises give rise to deviations of the color series from purely psychological ordering. The main aim is technical application in close connection with colorimetry.
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Richter et al. (1986) studied this question.
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