private boolean updateLookAndFeel() {
		try {
			cleanUiDefaults(); // clear out any values previous themes may have installed
			lookAndFeelManager.installLookAndFeel();
			notifyThemeChanged(new AllValuesChangedThemeEvent(true));
			return true;
		}
		catch (Exception e) {
			Msg.error(this, "Error setting Look and Feel: " + activeLafType.getName(), e);
		}
		return false;
	}
Initialized the Theme and its values for the application.
Ghidra/Framework/Gui/src/main/java/generic/theme/ApplicationThemeManager.java