I like the output of the default html.pl,
but need to change the background and
table cell colors. Can someone tell me
where these colors are defined? Thanks.

Look in the build_html_record and build_html_record_form subroutines in your db.cgi file. You'll have to edit several lines of code as there are many IF/ELSE conditional print statements.

Basically just add something like bgcolor= in the <td...> areas of this code. I use variables $leftside and $rightside, which I can change easily in default.cfg. This lets me try out several color schemes without having to reqrite each line of code.