Color adjuster and program

A color adjuster comprising:

• a processor;
• and
• a storage part communicatively coupled to the processor, the storage part comprising instructions that, when executed by the processor, cause the color adjuster to, at least, execute:
• a color specifier function that specifies a color when an image former forms an image;
• a pre-modified candidate acquirer function that obtains a calculated value to which a profile for forming an image is applied or a colorimetric value of an image forming result with respect to the color specified by the color specifier;
• a modification history database that stores the calculated value or the colorimetric value obtained by the pre-modified candidate acquirer, the calculated value and the colorimetric value being associated with a past modified value;
• a modified value determinator function that determines a modified value of the calculated value or the colorimetric value obtained by the pre-modified candidate acquirer on the basis of the past modified value stored in the modification history database, and, upon a determination that a color adjustment state is not satisfactory, user input indicating a manual adjustment with respect to the specified color;
• and
• a modified value outputter function that displays or outputs the modified value determined by the modified value determinator.