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

EN Using Color Modes 2-13
HP-GL/2 Imaging Mode
The HP-GL/2 Imaging Mode provides a way of using vector
commands in printing documents. Although the default PCL and
HP-GL/2 palettes are not the same, when transferring from PCL to
HP-GL/2, active palette information does stay the same. You can
switch between PCL and HP-GL/2 and use the same palette, and you
can also modify palettes using either PCL or HP-GL/2.
Compared to monochrome printers, the HP Color LaserJet printer
family, DeskJet 1200C and 1600C color printers have some
commands that are new and/or modified for use with color printers.
Chapter 7 describes the new or modified HP-GL/2 commands.
If you are not familiar with using HP-GL/2, see the PCL 5 Printer
Language Technical Reference Manual. It provides a detailed
explanation of using HP-GL/2.