![]() Depending on your artwork, the colors might shift a little or a lot. If you’re designing artwork in an RGB color space, we’ll have to convert it to CMYK to print. Paper can only reflect light, so if you print the super-bright RGB colors in CMYK, they get a lot duller. ![]() Your RGB monitor is generating light, so it can create some bright colors that can’t be duplicated on any CMYK printing press. So why is the difference important? Most colors created on your RGB monitor can be duplicated using CMYK inks, but not all. ![]() All commercial, full-color printing uses CMYK inks. By mixing varying amounts of cyan, magenta, yellow, and black inks, you can create most other colors. A fourth color, black, is added for economical and practical reasons, and is referred to by ‘K’ so as not to be confused with blue. When you add cyan, magenta, and yellow together (CMY), you get a color close to black, and when you don’t lay down any ink, you get white-that is, the white of the paper. It has to rely on reflected light, and the subtractive color model CMYK. The paper of a magazine, catalog, or CD booklet can’t generate light like a computer monitor. By mixing varying amounts of red, green, and blue light, you can create most other colors. RGB is additive because when you add all three colors together, you get white light when you turn off all three lights, you get black. You’ll be able to see the red, green, and blue bands. For a quick science project, put a drop of water on the front of your monitor in a white area, and it will act like a magnifying glass. A monitor uses very small bands of red, green, and blue light to generate color. The RGB color model is used by monitors, televisions, scanners, and digital cameras. We’ll have to delve into a little science to explain this difference. CMYK and RGB are two different color models, and understanding the difference can mean producing a great-looking insert rather than a muddy, disappointing one.
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