Hoecker-Plot is a graphical tool for quickly evaluating digital proofs based on the CIEDE2000 color difference formula. It consists of four boxes with different dimensions and colors (white, light gray, dark gray, and black). The boundaries of the boxes represent statistical data gathered from a set of color differences, and the size of each box is determined by the number of color differences between two boundaries. The different colors of the boxes are mainly for better distinction, and a completely green background is usually a good sign.
