Dell 3115cn Color Laser Printer - Manual (Page 545)

This option is available only for color printing and when entry data is RGB data.
-y sc=mode
Specifies screen.
Available screens are as follows:
0
Fineness
1
Gradation
2
Auto
3
For Transparency
-y gg=mode
Specifies gray guaranteed.
Available gray guaranteed modes are as follows:
on
On
off
Off
This option is available only for color printing.
-y ct
Specifies color transformation.
This option is available only for color printing.
-y br=mode
Specifies brightness adjustment.
Available brightness adjustment option value are as follows:
+5
Bright 5
+4
Bright 4
+3
Bright 3
+2
Bright 2