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

3-18 Using Palettes EN
Note Foreground color interacts with color raster images. In the printer, all
color raster is resolved into three binary raster planes of CMY.
Foreground color is applied to these planes, modifying the color
image. For no interaction, set foreground color to black when sending
color raster images.
After a foreground color is selected, changing any of the following will
not change foreground color until a new Foreground Color command
(
?*v#S) is issued:
• Active Palette
• Configure Image Data (CID) command
• Render Algorithm