On X11/Motif the default fonts and colors (and certain other properties) used in CAPI elements are determined by the applicable X resources.
To construct custom X resources for your CAPI/Motif application, consult the file
which is supplied in the LispWorks library for relevant platforms.This file contains the application fallback resources for LispWorks 5.0 and illustrates resources you may wish to change for your application.
contains the application fallback resources for the Lisp Monitor window. The files
contain the fallback resources that were supplied with LispWorks 4.4.
For further information about X resources, consult documentation for the X Window system.