The printing colors C (cyan), M (magenta), Y (yellow), and K (black) are colors composed of different percentages, and are therefore also known as mixed colors. During the printing process, these four colors have their own independent color versions, and the corresponding color network is recorded in the color version. When these four color versions are combined together, they form the defined original color. These dots are actually separated on paper, but due to their close proximity, they are indistinguishable by the human eye, resulting in a visual mixture of various colors and a rich variety of colors.