You can use the `setTheme()` method to switch the light/dark theme of PyQt-Fluent-Widgets. The parameter of `setTheme()` accepts the following three values:
*`Theme.LIGHT`: Light theme
*`Theme.DARK`: Dark theme
*`Theme.AUTO`: Follow system theme. If the system theme cannot be detected, the light theme will be used.
When the theme changes, `qconfig` will emit the `themeChanged` signal.
### Theme color
You can use `setThemeColor()` method to change the theme color of PyQt-Fluent-Widgets. This method accepts the following three types of parameters:
*`QColor`
*`Qt.GlobalColor`
*`str`: Hex color strings or color names, such as `#0065d5` or `red`.