Provided are a controller, a color chart and a non-transitory recording medium. The color chart includes a first patch that is a halftone patch of first color, a second patch that is the halftone patch of the first color underlaid with a solid base of second color, and comparative patches prepared by increasing and decreasing the tone of the first color of the first patch and second patch, where the printed surface of the color chart is finished with transparent material. The controller calculates tone values or dot gains of the first patch and second patch based on the measured color values of the patches in the color chart, and determines the current condition of print and the current condition of a finished surface by using a comparison result of the tone values or dot gains of the first patch and second patch with respective reference values.