1. A profile creation method for creating a color conversion profile for a printer by causing the printer to output a color chart including a plurality of patch images, the method comprising the steps of: (a) acquiring a colorimetric value of one patch image included in the color chart output by the printer; and (b) correcting the colorimetric value of the one patch image acquired at the step (a) based on a degree of variation determined about previously accumulated colorimetric values of patch images corresponding to the one patch image, each of the patch images being a patch image of a respective one of a plurality of previously printed color charts, wherein the step (a) and the step (b) are executed for each patch image of the plurality of patch images included in the color chart.