private void updateEdgeColorsFromOptions(Options rootOptions) {
		Options options = rootOptions.getOptions(EDGE_COLORS);
		for (String edgeType : graphType.getEdgeTypes()) {
			Color current = getEdgeColor(edgeType);
			Color color = options.getColor(edgeType, current);
			if (color != null && !color.equals(current)) {
				setEdgeColor(edgeType, color);
			}
		}
	}
Loads values from tool options

@param tool the tool from which to update values.
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/GraphDisplayOptions.java