LispWorks 6.0 for Windows (and earlier versions) allowed integers to be used as the
foreground
and
background
graphics state parameters in Graphics Ports drawing functions such as
gp:draw-string
and
gp:draw-rectangle
. This was not documented and should not be used. In particular, it will not work with quality drawing.
LispWorks Release Notes and Installation Guide - 23 Dec 2011