1. A pupil color estimating device comprising: a skin color specifying unit for specifying a skin color of a subject person in an inputted image; and a pupil color estimating unit for estimating, based upon the skin color specified by the skin color specifying unit and an association between a skin color and a pupil color that does not have an abnormality, a color of a pupil of the person that should be shown in the image, wherein the association is stored in a memory section in advance.