sytle.qss

QDialog{
    background: #e7e7e7;
}
QPushButton {
    background: white;
    border: 1px solid black;
    border-radius: 4px;
}
QPushButton:pressed {
    background-color: blue;
}
QComboBox {
    font: 20px;
}
QLabel {
    font-size: 20px;
}
QGroupBox[objectName="groupBox"] > QPushButton:checked {
    background: blue;
    color: white;
}
QGroupBox#groupBox > QPushButton:!checked {
    background: white;
    color: black;
}
QGroupBox#groupBox_4 > QPushButton:checked {
    background: blue;
    color: white;
}
QGroupBox#groupBox_4 > QPushButton:!checked {
    background: white;
    color: black;
}
QGroupBox {
    border: 2px solid gray;
    margin-top: 2ex;
    font: 20px;
}
QGroupBox:title {
    subcontrol-origin: margin;
    subcontrol-position: top left;
    left: 10px;
    margin-left: 0px;
    padding: 0 1px;
}
QGroupBox#groupBox_29 > QLineEdit {
    font: 20px;
}
QTabWidget::pane {
    border-top: 2px solid black;
}
QWidget#tab,QWidget#tab_2 {
}
QTabWidget::tab-bar {
    alignment: left;
    left: 80px;
    top:5px;
}
QTabBar::tab{
    width: 100px;
    height: 30px;
    font-size: 14px;
}

QPushButton#btn_serwo:!checked, QPushButton#btn_switch:!checked {
    border-image:url(:/close.png);
}
QPushButton#btn_serwo:checked, QPushButton#btn_switch:checked {
    background: yellow;
}