1. A color value acquiring method comprising: a first inputting step of inputting a type of print medium and a type of protective film; a data acquiring step of acquiring color reproduction data of a print obtained by forming an image on a print medium corresponding to the input type of print medium, and spectral data of a protective film corresponding to the input type of protective film; a reference color determining step of determining a reference color based on color information of a designated color to be reproduced on a protective-film-covered print obtained by laminating the protective film on the print; a reference color converting step of converting the determined reference color into another reference color depending on the print without the protective film laminated thereon, based on the acquired color reproduction data of the print and the acquired spectral data of the protective film; a printing step of printing a color chart including a plurality of color patches, based on a plurality of color values depending on the converted other reference color or colors close to the other reference color; a second inputting step of inputting identification information of a color patch, the color patch having been selected, from the printed color chart, as a color that is closest to the designated color, under a condition where the protective film is not laminated; and a color value acquiring step of acquiring a selected color value that is a color value depending on the selected color patch, based on the input identification information.