After presenting an overview of color spaces, more details about the device-independent and perceptually linear CIE color spaces are given. The advantages and disadvantages of existing color distance algorithms (E76, E94 and E2000) are also introduced. Finally, we present the results of our research about the human perception of colors where we have compared the results of the experiments with the existing color distance algorithms, which helps us to locate the parts of the spectrum where results of the latest standard E2000 do not correspond to human's perception of color differences. At the end we propose a formula that locates the part of the spectrum where improvements in the standard should be done.
human perception, color difference