The three major uses of spectral color curves are: 1. Obtaining raw data for calculation of trestimulus values and other colorimetric data. 2. As an input for automated color matching instrumentation. 3. As a fingerprint or hitching post for pigment standards or color print standards. In this paper a forth and most important use of the color spectral curve will be introduced to you, and that is its direct and comparative interpretation. What is meant by the word interpretation in this context? Basically we are talking about predicting the visual stimulus which this set of spectral data represented by the color curve will produce; or put more simply, how will this color look to an average normal observer?