CMYK, also known as printing color mode, is used for printing as its name implies. It is a color registration mode used in color printing. It uses the principle of three primary colors of pigment and black ink, and four colors are mixed and superimposed to form the so-called "full color printing".
RGB is designed according to the principle of color luminescence. Generally speaking, its color mixing method is like three light areas of red, green and blue. When their lights overlap each other, the colors are mixed, but the brightness is equal to the sum of their brightness. The more mixing, the higher the brightness, which is additive mixing.
Extended data:
Differences between CMYK and RGB modes:
1, RGB mode is a luminous color mode, and you can still see the contents on the screen in a dark room.
2.CMYK mode is a color mode that depends on reflection. When we read a newspaper, sunlight or light shines on the newspaper, and then it is reflected to our eyes before we see the content. It needs an external light source. If you are in a dark room, you can't read the newspaper.
As long as the image displayed on the screen is in RGB mode. As long as you see an image on printed matter, it is represented by CMYK mode. Such as periodicals, magazines, newspapers, posters, etc. They are all printed, so they are in CMYK mode.
References:
Baidu encyclopedia -CMYK
References:
Baidu encyclopedia -RGB