You can change CLIM's color scheme and default fonts with X resources. Place your X resources in a file called
CLIM port
(that is, nine characters including the space) on your resource lookup path.
These are the default resources:
*buttonFontList: *times-bold-r-normal--14*
*labelFontList: *times-bold-r-normal--14*
CLIM port*CLIM-menu-bar*foreground: #000080
CLIM port*CLIM-menu-bar*background: #b3e6fd
CLIM port*CLIMprogressbar.foreground: Red
CLIM port*CLIMpointerdoctext*foreground: #000080
CLIM port*CLIMpointerdoc*background: #b3e6fd
CLIM port*foreground: Black
CLIM port*background: White
By default, CLIM windows are mostly white. This specified in the last line above.
Common Lisp Interface Manager 2.0 User's Guide - 20 Sep 2011