Color conversion apparatus, and color conversion method

A color conversion apparatus comprising:

• a first-calculation-term generating unit responsive to first color data representing respective colors of red, green and blue, for generating a first calculation term which is effective for at least one of the hues of red, green, blue, cyan, magenta and yellow;
• a second-color-data generating unit for generating second color data corresponding to the first color data;
• and
• a third-color-data generating unit responsive to the first calculation term, and the second color data, for generating third color data suitable for the color space expressed by the image output unit used for outputting the color image.