Newbie Q, how to change label color

[Stephen Birch <sbirch ironmountainsystems com>]

I am having a devil of a time figuring out how to change the foreground
and background colors of labels packed in a box.

Could someone either let me know how colors are set, or point me to the
docs so I can RTFM?  I have checked the info page and the tutorial to no
avail, and I can't figure it out from the source code.

Help!

Steve