Color reproduction system for making color display of four or more primary colors based on input tristimulus values

A color reproduction system comprising:

• a color image display unit capable of displaying a color image of at least four primary colors;
• and,
• a color converting unit for converting input tristimulus values into color image signals of respective primary colors of the color image display unit,
• wherein the color converting unit includes:
• an area deciding section for deciding which one of a plurality of color conversion areas the input tristimulus values belong to in a three-dimensional color space;
• and
• a color image signal calculating section for converting the input tristimulus values into the color image signals of the respective primary colors based on color conversion parameters corresponding to the color conversion area decided by the area deciding section, and
• wherein the color converting unit obtains a color image signal that is larger than 0 for at least four primary colors in at least one of the color conversion areas.