1. An iris color correction apparatus comprising: a skin color identification means which identifies the skin color of a photographed person in an inputted image; a skin correction color calculation means which obtains a skin correction color that is an iris color of said person that should be shown in said image based on the skin color identified by said skin color identification means; an original iris color calculation means which obtains an original iris color that is a representative color of a peripheral region of the iris of said photographed person from the color of pixels included in the peripheral region; a correction reference color setting means which acquires said obtained skin correction color and original iris color, and sets one of the skin correction color and the original iris color to be a correction reference color when correction is carried out; and a correction means which corrects the iris color of said photographed person based on said correction reference color; wherein said correction reference color setting means compares the obtained said original iris color and the iris color obtained by correcting the peripheral region of said iris based on the obtained said skin correction color, and sets said original iris color as said correction reference color in the case where said corrected iris color has more redness than said original iris color, and sets said skin correction color as said correction reference color in the case where said corrected iris color has less redness than said original iris color.