[uml-user] Set terminal background color

[Christoph B. <dj....@gm...>]

Hi everybody,
I am invoking my UML instances from an rxvt terminal window with black
background and white foreground color. For some weird reason the
terminal window that pops up with the UML login prompt is inverted -
white background and black text color.
I've no idea where to change this. What is really weird is that I moved
my UML images from one host (running Debian) to another (running Ubuntu)
 - this color inversion only appears on the latter one. Does anybody
have a clue where to change terminal window background colors?

(When calling rxvt one can pass the colors to rxvt as arguments. But UML
opens another terminal window with different colors...)

Currently, I start my UML instances that way:
./linux mem=64M ubd0=./umlmaster.img ubd1=./swapmaster.img con=pty
con0=fd:0,fd:1 con1=xterm eth0=tuntap,tap0

Any help is appreciated, thanks very much in advance!