To easily analogically infer a difference of colors due to a change of a halftone dot density of a K plate by displaying more colors on one page, constituting a color chart on less pages and easily selecting the color.

The color chart comprises a plurality of pairs of color display blocks la, 1b having a plurality of arrayed rows and stages, each block la or 1b having a plurality of color display frames. The each display frame of the each block 1a, 1b has a halftone dot density in which any one of a C plate, an M plate and a Y plate is changed in a predetermined stage. And, the plates are respectively printed at predetermined halftone dot density set another one plate at each row, and the residual one plate is printed at the predetermined halftone dot density set at each stage. One frame of the pairs of the display blocks is printed at the K plate at least two predetermined halftone dot densities changing stepwisely.