Oki C9850hdn Advanced User's Manual page 21

Brightness and saturation
NOTE
This feature is available with PCL 6 only.
Before printing a document, you can adjust the brightness and saturation settings:
SETTING
Brightness
Saturation
To adjust these settings:
1. Click the Colour tab.
2. Select Manual Settings and click Options....
3. Use the horizontal scroll bars to adjust the brightness and saturation levels.
Matching specific colours
Use the Colour Swatch Utility to print out a chart of RGB swatches. Select your desired RGB
values from the swatches and enter the values in your application's colour picker.
See Utilities for more information.
DESCRIPTION
Determines the total amount of light (white) in the colour.
Zero brightness is black. 100% Brightness is white.
Intermediate values are "light" or "dark" colours.
The degree of saturation of a colour is its relative purity, or
intensity.
Printing from Windows – PCL > 21