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

EN Using Color Modes (Color LaserJet, 5, 5M, DeskJet) B-7
Common 6-Byte Header
The short and long forms of the CID command use a common 6-byte
header, regardless of which color space is specified. The header data
fields, whose meaning may vary according to the color spaces, are
present in all color space specifications. The short form and long form
of the CID command are explained separately in the following pages.
Byte 0 (Color Space)
This byte specifies the color space. The range of values is 0 through
4. All other values are ignored.
Byte 15 (MSB) 8 7 0 (LSB) Byte
0 Color space (UBYTE) Pixel encoding mode
(UBYTE)
1
2 Bits/index
(UBYTE)
Bits/primary #1
(UBYTE)
3
4 Bits/primary #2
(UBYTE)
Bits/primary #3
(UBYTE)
5
Byte Value Color Space
0 Device RGB (default)
1Device CMY
2 Colorimetric RGB Spaces
3 CIE L*a*b*
4 Luminance-Chrominance Spaces