1. A color processing method comprising: using a processor to perform the steps of: obtaining measurement values regarding a gloss characteristic of a plurality of patches formed based on patch data in which a color material amount of a clear color material is changed with respect to an output value from a color separation table for color materials; selecting one measurement value from the measurement values of the plurality of patches for each color or gray level indicated by the patch data; and generating, based on the selected measurement value and the color separation table, a color separation table in a case where the color materials and the clear color material are used.