@Override
	public void setLookAndFeel(LafType lafType, boolean useDarkDefaults) {

		if (activeLafType == lafType) {
			return;
		}

		if (!lafType.isSupported()) {
			Msg.error(this, "Attempted to set unsupported Look and Feel: " + lafType);
			return;
		}

		this.activeLafType = lafType;
		this.useDarkDefaults = useDarkDefaults;

		update(() -> {
			lookAndFeelManager = lafType.getLookAndFeelManager(this);
			updateLookAndFeel();
		});
	}
Initialized the Theme and its values for the application.
Ghidra/Framework/Gui/src/main/java/generic/theme/ApplicationThemeManager.java