Designing a modern desktop application with a dark mode feature is a great way to enhance user experience. Here's how you can do it using both PyQt6 and PySide6: PyQt6: ```python import sys from PyQt6.QtWidgets import QApplication, QWidget from PyQt6.QtGui import QPalette, QColor class DarkModeApp(QWidget): def __init__(self): super().__init__() self.setWindowTitle("Dark Mode App") self.setGeometry(100, 100, 800, 600) self.set_dark_mode() def set_dark_mode(self): palette = QPalette() palette.setColor(QPalette.ColorRole.Window, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.WindowText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Base, QColor(25, 25, 25)) palette.setColor(QPalette.ColorRole.AlternateBase, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.ToolTipBase, QColor(0, 0, 0)) palette.setColor(QPalette.ColorRole.ToolTipText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Text, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Button, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.ButtonText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.BrightText, QColor(0, 128, 0)) palette.setColor(QPalette.ColorRole.Highlight, QColor(0, 128, 0)) palette.setColor(QPalette.ColorRole.HighlightedText, QColor(0, 0, 0)) app.setPalette(palette) if __name__ == "__main__": app = QApplication(sys.argv) window = DarkModeApp() window.show() sys.exit(app.exec()) ``` PySide6: ```python import sys from PySide6.QtWidgets import QApplication, QWidget from PySide6.QtGui import QPalette, QColor class DarkModeApp(QWidget): def __init__(self): super().__init__() self.setWindowTitle("Dark Mode App") self.setGeometry(100, 100, 800, 600) self.set_dark_mode() def set_dark_mode(self): palette = QPalette() palette.setColor(QPalette.ColorRole.Window, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.WindowText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Base, QColor(25, 25, 25)) palette.setColor(QPalette.ColorRole.AlternateBase, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.ToolTipBase, QColor(0, 0, 0)) palette.setColor(QPalette.ColorRole.ToolTipText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Text, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.Button, QColor(53, 53, 53)) palette.setColor(QPalette.ColorRole.ButtonText, QColor(255, 255, 255)) palette.setColor(QPalette.ColorRole.BrightText, QColor(0, 128, 0)) palette.setColor(QPalette.ColorRole.Highlight, QColor(0, 128, 0)) palette.setColor(QPalette.ColorRole.HighlightedText, QColor(0, 0, 0)) app.setPalette(palette) if __name__ == "__main__": app = QApplication(sys.argv) window = DarkModeApp() window.show() sys.exit(app.exec()) ``` In this code, we create a simple window and apply a dark mode theme to it. This will make your application more appealing and easier on the eyes, especially in low-light environments. For more tips and tutorials, visit our YouTube channel at https://www.youtube.com/@SpinnTv or our website at https://www.spinncode.com.