You may be correct. The Manifest includes demo.pl, wherein we find:

my $color = $args{-c};
...

my $dtf = $mw->DynaTabFrame(
    -font => 'Arial 8', 
    ...
    -tabcolor => $color,
        ....
[download]

Both the doc (aka readme) and the demo are a bit sparse.

But you may wish to look at the output of the demo, which may provide some additional insights (if you find any colorized text).