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Existing specification systems, such as the hue/ lighness/saturation system, use triples of numbers to spec1fy color, which can be tedious to work with. The Color Naming system allows users to specify color in natural lanuage phrases or words and is a siperior way for humans to select colors. the problems addressed in this article is how to map the linguistic values of the CNS to the numerical values of the HLS system so that the CNS can be part of an integrated graphics system. The algorithm used is based on fuzzy set theory and is implemented for the Tektronix 4027 color display terminal.