Background color of HBox, Label or Table

[Jens Wilke <jens wilke org>]

Hi,

i tried to change the background color of a HBox, Table or Label, this 
does not work. Changing the Color of a Window or Button works like 
this: $widget->modify_bg('normal', Gtk2::Gdk::Color->new (0,0,0));
what might be wrong?
I need this for the background of an image viewer, hope this is a honest 
reason...

Rgds, Jens