Oki C5800 - Manual (Page 35)

Printer settings in Mac> 35
Monitor (9300K)
Optimised for printing graphics from applications such as
Microsoft Office. Colors are printed with emphasis on
Lightness.
Digital Camera
Results will vary depending on the subject and conditions
the image was taken.
sRGB
The printer reproduces the sRGB color space. This might be
useful if color matching from an sRGB input device such as
a scanner or digital camera.
Black Finish
Controls the way black is printed in color documents.
Composite Black (CMYK): Uses all 4 toner colors to
represent black. Recommended for color photos.
True Black (K): Uses 100% black toner to represent
black. Recommended for text and business graphics.
Brightness / Saturation
Increase Brightness for a lighter print. Modify saturation to
change the strength (or purity) of color.
If the printed colors are too strong, reduce saturation and
increase brightness. As a general rule, the saturation
should be stepped down an equal amount to the increased
brightness. For example, if you reduce saturation by 10,
increase brightness by 10 to compensate.