code: def dark(app):
      
  
      _apply_base_theme(app)
  
      darkPalette = QPalette()
  
      # base
      darkPalette.setColor(QPalette.WindowText, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.Button, QColor(53, 53, 53))
      darkPalette.setColor(QPalette.Light, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.Midlight, QColor(90, 90, 90))
      darkPalette.setColor(QPalette.Dark, QColor(35, 35, 35))
      darkPalette.setColor(QPalette.Text, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.BrightText, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.ButtonText, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.Base, QColor(42, 42, 42))
      darkPalette.setColor(QPalette.Window, QColor(53, 53, 53))
      darkPalette.setColor(QPalette.Shadow, QColor(20, 20, 20))
      darkPalette.setColor(QPalette.Highlight, QColor(42, 130, 218))
      darkPalette.setColor(QPalette.HighlightedText, QColor(180, 180, 180))
      darkPalette.setColor(QPalette.Link, QColor(56, 252, 196))
      darkPalette.setColor(QPalette.AlternateBase, QColor(66, 66, 66))
      darkPalette.setColor(QPalette.ToolTipBase, QColor(53, 53, 53))
      darkPalette.setColor(QPalette.ToolTipText, QColor(180, 180, 180))
  
      # disabled
      darkPalette.setColor(QPalette.Disabled, QPalette.WindowText,
                           QColor(127, 127, 127))
      darkPalette.setColor(QPalette.Disabled, QPalette.Text,
                           QColor(127, 127, 127))
      darkPalette.setColor(QPalette.Disabled, QPalette.ButtonText,
                           QColor(127, 127, 127))
      darkPalette.setColor(QPalette.Disabled, QPalette.Highlight,
                           QColor(80, 80, 80))
      darkPalette.setColor(QPalette.Disabled, QPalette.HighlightedText,
                           QColor(127, 127, 127))
  
      app.setPalette(darkPalette)
docs: Apply Dark Theme to the Qt application instance.
  
          Args:
              app (QApplication): QApplication instance.