When customers receive a sample, they need to perfectly reproduce the same color as the sample, which requires repeated confirmation of the sample. Early color management relied on comparing the differences between the sample and the sample with the human eye, but these differences were not perceptible to the naked eye or appeared very inconspicuous, so the process was handed over to the workshop for production. This approach is too subjective, not everyone's opinions and visual effects are the same, and it is greatly influenced by external factors. So in modern color management, people use colorimeters in conjunction with computer systems. The great advantage of using colorimeters to participate in color matching is that they can correct the formula based on the data provided by the colorimeter, which can complete the color matching task faster and more accurately.