XCMSDB(1)
XCMSDB(1)          xcmsdb  -  Device Color Characterization
utility for X Color Management          xcmsdb [ -query ] [
-remove ] [ -format 32|16|8 ] [ filename ]          xcmsdb is
used to load, query, or remove Device Color  Characterization
data stored in properties on the root window of the screen as
specified        in section 7, Device Color  Characterization,
of  the  ICCCM.   Device        Color  Characterization  data
(also  called  the Device Profile) is an        integral part of
Xlib’s X Color Management System (Xcms), necessary for
proper conversion of color specification between device-
independent and        device-dependent  forms.   Xcms  uses
3x3  matrices  stored   in   the
XDCCC_LINEAR_RGB_MATRICES  property  to  convert  color
specifications        between CIEXYZ and RGB Intensity
(XcmsRGBi, also referred to as  linear        RGB).    Xcms
then  uses  display  gamma  information  stored  in  the