A non-transitory computer-readable medium stores computer-readable instructions, when executed by a computer, causing the computer to execute a process. The process includes: obtaining image data; obtaining thread colors as available colors for sewing an embroidery pattern; setting a first color representing a target area; in a case where at least one color is assigned from the available colors as a color representing the target area, selecting a color close to the first color when combined with the at least one color assigned, from the available colors, as a candidate; determining whether a difference between color information representing the at least one color assigned and color information representing the candidate is smaller than a threshold value; in a case where the difference is smaller than the threshold value, adding the candidate to the at least one color assigned; and generating embroidery data associating thread color data with position data.

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