$back = #FFFFFF; $tabColor = #AAFFFF; $borderColor = #FF0000; QFrame { background-color: $back; } QPushButton { background-color: $back; border-width: 2px; border-color: darkkhaki; border-style: solid; border-radius: 5; padding: 3px; font: 30px "Arial"; } QPushButton:pressed { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #dadbde, stop: 1 #f6f7fa); } QTabWidget { font: 20px "Arial"; } QTabBar::tab { padding: 5px; font-size: 20px; background-color:$tabColor; }