Oki ES1624n Technical Reference page 57

No Color Matching
No color correction occurs when selected. This option is beneficial
when other matching regimens are used, specifically if you select a
Color Simulation option.
Print In Grayscale
No color will print. The printer will interpret all colors as a variation of
grays.
Color Setting
This option allows you to select your color settings as they appear
on your monitor.
Monitor(6500k) Auto
The default setting that selects the best options for your printer. This
selection works best for office situations.
Monitor (6500k) Perceptual
Optimized for printing photographs when using a monitor with a color
temperature of 6500K, This is best for printing photographic images.
Monitor (6500k) Vivid
Optimized for printing bright colors when using a monitor with a color
temperature of 6500K. Ideal for office graphics and text. Vivid or
Digital Camera settings produce brightest colors.
Monitor (9300k)
Optimized for printing photographs when using a monitor with a color
temperature of 6500K.
Macintosh OS X: Operation • 57