Dell 3115cn Color Laser Printer User Manual page 606

-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
+1
Bright 1
+0
Normal
-1
Dark 1
-2
Dark 2
-3
Dark 3
-4
Dark 4
-5
Dark 5
-RGBc=mode
Specifies RGB color correction.
Available RGB color corrections are as follows:
10