there's a Fluxbox wiki but i don't always find it very helpful
http://fluxbox-wiki.org/index.php?title=Fluxbox-wiki a number of predefined styles are provided in /usr/share/fluxbox/styles
i just copied one to /home/<user account>/.fluxbox/styles and renamed it <new style>
a full component list is here:
http://manpages.ubuntu.com/manpages/natty/man5/fluxbox-... hex rgb color tables are easily available, for example:
http://www.web-source.net/216_color_chart.htm select Fluxbox menu >> User styles >> <new style>
edit the style file to your liking
using Fluxbox menu >> Restart to see what your changes are doing
comment lines in the style file begin !
there may once have been some utilities fluxconf and fluxmenu
but slackware doesn't seem to make them available
websearch suggests they are buggy and or out-of-date
/home/<user account>/.fluxbox contains a file menu
it's not hard to understand and edit by hand
for example, if you want xterm to launch with a black background and green text
you can change the line
(xterm) {xterm}
to (xterm) {xterm -bg black -fg green}
comment lines in the menu file begin #