Stylesheet for QCheckBox - where does the background color come from?

[ChrisW67]

Possibly because the white portion of your checkmark image is not transparent so it is overlaying the background when it is painted. Try the attached image: checkmark_grey.png

[anr78]

I will (when I get to work), but that can't be all that happens? If you look at my screenshots, all the colors change when I add the checkmark image.