private void updateVertexColorsFromOptions(Options rootOptions) {
		Options options = rootOptions.getOptions(VERTEX_COLORS);
		for (String vertexType : graphType.getVertexTypes()) {
			Color current = getVertexColor(vertexType);
			Color color = options.getColor(vertexType, current);
			if (color != null && !color.equals(current)) {
				setVertexColor(vertexType, 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