In an age where the wealth of information continuously grows, color not only fulfills the purpose of optically enriching data in the sense of successful presentations, but is also an important carrier of a large quota of this information. Computer Graphics without the use of color is something that can no longer be imagined. Application areas, such as technical, scientific visualization, document processing and medical image diagnostics are more dependent on exact reproducibility of color tints. Due to this necessity, great demands are made on the input and output equipment being used in these areas in relation to color fastness. This is especially true for the display systems as the numerically most common data terminal. When using color as the carrier of information in Computer Graphics' applications, there are two essential problematic aspects: • Reproducibility of an excellent chrominance on the display at various times, as well as on different displays at the same time. • Distinguishability of a row of hues, i.e. a color progression in all of its shades Both aspects are to be regarded as fundamental prerequisites. The reasons for the existence of these problems lies in the physical limitations of a display system. The need for a system to calibrate the hues respective to color correction is evident. In order to analyze the possible starting-points of such a correction more exactly, the essential factors influencing the color representation are briefly characterized in the following section.