Widgets background problem (styled with CSS)

[roxton]

Hello!
I need to set backgrounds for my widgets. I use the global css-file and set it using qApp->setStyleSheet.
At css-file, I need to set separately colors for all widgets and QTabWidget::pane subcontol. So I write:

QWidget
{
  background-color: blue;
  color: white;
}
 
QTabWidget::pane{
 border-top: 1px solid grey; 
 background-color: red;
}

QWidget
{
  background-color: blue;
  color: white;
}

QTabWidget::pane{
 border-top: 1px solid grey; 
 background-color: red;
}

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The problem is - QWidget's style's background is preffered over QTabWidget::pane. If I comment out QWidget's background-color, the QTabWidget::pane background-color works fine and I see the red background. But if QWidget's background-color is set, the QTabWidget::pane will be the same as QWidget's background-color.
How to solve this problem?