@mikeone: Thanks for the tip; this works just fine.
@Kostya, I apologise beforehand if I misunderstood, but your replies seem a bit sarcastic to me. All I have been asking for, is consistency and the option to choose our own background colour and not forcing a questionable designer decision upon us. Your app used to be all about that, i.e. options for the user in the past. I'm not sure the new ownership respects that.
Sorry for the off-topic.