CMYK, also called process color, is a subtractive color model, which refers to the process of creating colors by adding cyan, magenta, yellow, and black ink together. Adding the colors of ink together reduces light, and, therefore, a combination of all the colors results in black. It is an ink-on-paper model, i.e., used in print production.
RGB is an additive color model, which refers to the process of creating colors by adding red, green, and blue light together. Adding the colors of light together increases light, and, therefore, a combination of all the colors produces white. It is a light model, i.e., used on monitors, televisions, and projectors.
The two color profile options, therefore, have very little bearing on the CM/ECF world of black-and-white text documents that are displayed both on screens and in print form. Choosing a particular profile is only relevant if color charts or graphics are part of the filing, and then only if there is some concern that colors be exactly reproduced. As a rule, RGB color reproduction (as well as on-screen reproduction of a CMYK profile) can vary widely between monitors, and CMYK color reproduction can similarly vary widely between printers.
In short, either is fine.
|CMYK Color Model||RGB Color Model|
- Stands for Cyan, Magenta, Yellow,
and Key (black).
- A subtractive color model.
- Stands for Red, Green, and Blue
- An additive color model.