Oki C6100 Series User Manual page 220

The Graphic Pro color management system is
recommended for users who are already familiar with ICC
profile-based color matching and require more control
over color.
See page 219
No Color Matching
Use this option to turn off all printer color matching.
No color correction occurs when selected.
Use No Color Matching when you are using another color
matching method in your application (such as Color
Simulation).
See "CMYK ink simulations – CMYK source data" on
page 242.
See page 220
Grayscale
This option prints all documents as monochrome.
No color prints.
The printer interprets all colors as a variation of grays.
See page 220
Mac ColorSynch
This is the colour matching system built into the Mac OS
See page 255.
C6100 Series User's Guide
220