qcheckbox

I had the same issue, but finally got this to work. I’m using Qt 5 with the Fusion color theme: QPalette pal = button->palette(); pal.setColor(QPalette::Button, QColor(Qt::blue)); button->setAutoFillBackground(true); button->setPalette(pal); button->update(); Try these commands in the exact order as above, and if that still doesn’t work, set your theme to Fusion and try again. Good luck!