[gedit-list] how to set background color

[Petr Mach <petr mach cz gmail com>]

Hello,

I use Cobalt color theme, which has dark blue background. My problem
is that plugins (i.e. file browser plugin) ignore this setting and use
a white background. This is bad for my eyes. I was modified background
color in python script for class browser. But i do not know, how to
set background for file browser plugin. Any idea? Thanks.

Petr Mach