An information processing device comprising: a generator configured to generate image data to create a color chart with multiple patches; a receiver configured to receive specification of multiple specified colors used as a reference to produce the patches; and an evaluator configured to determine whether or not each specified color is a color in a gamut range, which is a range of colors a printing device can reproduce; wherein the evaluator, when the specified color is a color in the gamut range, is configured to cause the generator to generate the image data to create the color chart referenced to the specified color, with the color chart being generated by changing the color information of the specified color by a set difference, and characterized in that when the specified color is a color outside the gamut range, the evaluator is configured to select a color on a gamut surface based on the specified color, and cause the generator to generate the image data to create the color chart referenced to the selected color with the color chart being generated by changing the color information of the specified color by a set difference, for the multiple specified colors that are a color in the gamut range, the evaluator is configured to cause the generator to generate the image data to create the color chart referenced to each of the specified colors, and for the multiple specified colors that are a color outside the gamut range, the evaluator is configured to select a color on the gamut surface, and cause the generator to generate the image data to create the color chart referenced to the selected color, for each of the specified colors. a generator configured to generate image data to create a color chart with multiple patches; a receiver configured to receive specification of multiple specified colors used as a reference to produce the patches; and an evaluator configured to determine whether or not each specified color is a color in a gamut range, which is a range of colors a printing device can reproduce; wherein the evaluator, when the specified color is a color in the gamut range, is configured to cause the generator to generate the image data to create the color chart referenced to the specified color, with the color chart being generated by changing the color information of the specified color by a set difference, and characterized in that when the specified color is a color outside the gamut range, the evaluator is configured to select a color on a gamut surface based on the specified color, and cause the generator to generate the image data to create the color chart referenced to the selected color with the color chart being generated by changing the color information of the specified color by a set difference, for the multiple specified colors that are a color in the gamut range, the evaluator is configured to cause the generator to generate the image data to create the color chart referenced to each of the specified colors, and for the multiple specified colors that are a color outside the gamut range, the evaluator is configured to select a color on the gamut surface, and cause the generator to generate the image data to create the color chart referenced to the selected color, for each of the specified colors. <EOS>