MainWindow { border: 1px solid white; border-radius: 20px; padding: 10px; background-color: qlineargradient( x1: 0, y1: 0, x2: 1, y2: 1, stop: 0 #31312C, stop: 0.5 #808080 stop: 1 #31312C ); } QwtPlotCanvas { border: 1px solid White; border-radius: 10px; background-color: #101010; color: yellow; /* used as curve color */ } QwtScaleWidget { color: white; } WheelBox { qproperty-theme: #878787; } QwtWheel { /* background-color: yellow; */ qproperty-mass: 0.0; qproperty-tickCount: 5; qproperty-wheelWidth: 15; qproperty-borderWidth: 2; qproperty-wheelBorderWidth: 2; qproperty-wrapping: true; } Knob { qproperty-theme: #606060; } QwtKnob { qproperty-knobStyle: Sunken; qproperty-markerStyle: Nub; qproperty-markerSize: 8; qproperty-borderWidth: 2; } QLCDNumber { color: yellow; }