Oki C7350hdn User Manual page 319

Color Matching
Choosing a Method
RGB or CMYK?
The guidelines for choosing a color matching method make
distinctions between Red, Green, Blue (RGB) and Cyan,
Magenta, Yellow, Black (CMYK).
Generally, most documents you print are in RGB format. This is
the most common, and, if you do not know your document's
color mode, assume that it is RGB.
Typically, CMYK documents are only supported in professional
Desktop Publishing and Graphics applications.
C7350/7550 User's Guide: Windows Me/98/95 Operation • 319