1. A color evaluation apparatus, comprising: a first storage device configured to store a second character string which is associated in advance with each of color information pieces; a partial image identification device configured to identify a partial region of an input image; an information acquisition device configured to acquire color information for identifying a color contained in the partial region and a first character string contained in the partial region; a first extraction device configured to extract, from the first storage device, the second character string which is associated in advance with the color information acquired by the information acquisition device; and an evaluation device configured to evaluate appropriateness of the color information according to whether a similarity between the first character string and the second character string is greater than or equal to a threshold.