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This question relates to http://www.qtcentre.org/threads/18151-QScrollArea-misbehaving-background-style http://www.qtforum.org/article/34443/cannot-change-background-color-of-a-qscrollarea-with-setstylesheet.html I'm asking in here because I believe the SO community might have a way to fix this behavior. So I like to set the background color of a ScrollArea to either being transparent or to a custom background image as it will contain some banners. I got it running in the Qt Creator ( Designer ) already! :-): But when deploying the app to the simulator it won't work, the are stays gray, dark gray: Here is my layout tree: And here is the stylesheet I'm using (attached & set to the MainWindow): QMainWindow { background: transparent url(:/ui/designs/images_from_android/bg_plain_empty.png) top left; } QWidget#centralWidget { background-color: transparent; } QPushButton { color: red; border: 1px solid green; } QFrame#top_header { background: transparent url(:/ui/designs/images_from_android/bg_title_bar_landscape.png) top left repeat-x; } QWidget#top_banner_scroll1, QWidget#top_banner_scroll2 { background: transparent url(:/ui/designs/images_from_android/stripe_bg.png) top left repeat-x; } This is quite puzzling. And as Qt Designer is showing me the proper design...

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