const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);