Session Manager serves as the color server for the desktop and provides the following set of dtsession resources that can be used to configure it.
foregroundColor--controls whether a pixel is allocated for the foreground color
dynamicColor--specifies whether read-only colors are allocated
shadowPixmaps--specifies whether colors are allocated for top shadow or bottom shadow
colorUse--limits color allocation
writeXrdbColors--specifies whether the *background and *foreground resources are placed in the resource database
You can set color server resources for all users by creating /etc/dt/config/language/sys.resources and specifying the color server resources in that file.
Users can similarly set color server resources for their own sessions by specifying color server resources in HomeDirectory/.Xdefaults.
For more information about setting color server resources, see "Administering Colors".