and is outside the printer 39 s color gamut to the convergence point t the color p 1 having the maximum saturation value in the monitor 39 s color gamut is mapped onto the color s u2032 having the maximum saturation value in the printer 39 s color gamut 703 consequently in a case where the saturation value is decreased in the direction of the point p 1 to the point p 2 in the monitor 39 s color gamut 701 the saturation value is similarly reduced in the direction from the point s u2032 to the point p 2 u2032 to which the points p 1 and p 2 are respectively mapped on the color gamut 703 thus the reversal of the saturation does not occur fig8 is a graph illustrating the modification of the color gamut according to the first exemplary embodiment of the present invention which has been described above as shown in fig8 the first exemplary embodiment performs the modification that increases the lightness corresponding to each color that is a relatively high rate or large gradient linear transformation is performed on the colors of the range up to the maximum saturation point s having the lightness value l s in the printer 39 s color gamut 702 so that the lightness value l s is converted to the lightness value l s u2032 of the.