The principle of color conversion

The conversion between different color modes is based on an intermediate CIE Lab value as a reference. For example, the following example uses the characteristics of Monitor A to set a color R: 200 G:20 B:20, and the relative Lab value is L:50. a: 66 b:52, based on the characteristics of printer A to find out the value of CMYK.

However, when switching to printer B, the same display screen color will use another set of CMYK values ​​to produce the same effect. Similarly, the color produced by CMYK on printer B is displayed in Monitor B. The RGB value must be changed to another set of values ​​to obtain the same color, but note that the value on the lower middle Lab is unchanged.