HP PCL/PJL reference (PCL 5 Color) - Technical Reference Manual

2-4 Using Color Modes EN
The Simple Color palettes are structured as follows:
Single Plane (value = 1)
3-Plane RGB (value = 3)
3-Plane CMY (value = –3)
Index Color
0White
1Black
Index Color
0Black
1Red
2Green
3Yellow
4Blue
5 Magenta
6Cyan
7White
Index Color
0White
1Cyan
2 Magenta
3Blue
4Yellow
5Green
6Red
7Black