classic.css

/* Main Window */
QMainWindow {
    background-color: #c0c0c0;
    border: 2px outset #fff;
}

QMenuBar {
    background-color: #c0c0c0;
    border: 1px solid #000;
}

QMenu {
    background-color: #c0c0c0;
    border: 1px solid #000;
}

QMenu::item:selected {
    background-color: #000080;
    color: #ffffff;
}

/* Containers */
QFrame, QDialog {
    background-color: #c0c0c0;
    border: 2px outset #fff;
}

QGroupBox {
    border: 2px groove #808080;
    margin-top: 10px;
    background-color: #c0c0c0;
}

/* Buttons */
QPushButton {
    background-color: #c0c0c0;
    border: 2px outset #808080;
    padding: 2px;
}

QPushButton:pressed {
    border: 2px inset #808080;
    background-color: #c0c0c0;
}

QPushButton:disabled {
    color: #808080;
}

/* Scroll Bars */
QScrollBar:vertical, QScrollBar:horizontal {
    background: #c0c0c0;
    width: 16px;
    border: 1px solid #808080;
}

QScrollBar::handle {
    background: #808080;
    border: 1px solid #404040;
}

/* Labels */
QLabel {
    color: #000000;
    background: transparent;
}

/* Checkboxes and Radio Buttons */
QCheckBox, QRadioButton {
    background-color: #c0c0c0;
    color: #000000;
}

QCheckBox::indicator, QRadioButton::indicator {
    width: 13px;
    height: 13px;
}

QCheckBox::indicator:checked {
    background-color: #000000;
}

/* List and Table Views */
QListView, QTreeView, QTableView {
    background-color: #ffffff;
    border: 1px solid #000;
}

QTableView::item:selected, QListView::item:selected {
    background-color: #000080;
    color: #ffffff;
}

/* Text Inputs */
QLineEdit, QTextEdit, QPlainTextEdit {
    background-color: #ffffff;
    border: 2px inset #c0c0c0;
    color: #000000;
}

/* ComboBox */
QComboBox {
    background-color: #ffffff;
    border: 2px inset #c0c0c0;
    padding: 2px;
}

/* Sliders */
QSlider::groove:horizontal, QSlider::groove:vertical {
    background-color: #c0c0c0;
    border: 1px solid #000;
}

QSlider::handle:horizontal, QSlider::handle:vertical {
    background-color: #808080;
    border: 1px solid #404040;
}