Color reproduction assisting system and color reproduction assisting method

A plurality of printing conditions (60) and designated color information (62) are acquired, and it is judged whether a designated color specified from the designated color information (62) can be reproduced under the printing conditions (60) or not. On condition that at least one of the printing conditions (60) under which the designated color cannot be reproduced is judged as being present, then a substitute color that is different from the designated color is determined in order to increase the number of the printing conditions (60) under which the designated color can be reproduced. A display device (34) displays visible information (colorimetric value display field (166), color difference display field (168), and color patch group (170)) with respect to the substitute color.