public void dispose() {
		backgroundColorModel.removeChangeListener(backgroundChangeListener);
		for (int i = 0; i < 4; i++) {
			listingPanels[i].dispose();
		}
	}
Color the background of all 4 listings to the default color for all addresses.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/tool/ListingMergePanel.java