Gorgeous dress.
How about some metallic bronze/pewter/silver sandals/mules/peeptoes, they had lots of choice at reasonable prices in Dolcis a couple of weeks ago. And cheap as chips but good for a one-off at New Look too. I recently bought some high metallic gold peeptoes to go with a similar dress, thinking I wouldn't wear them again, but I've decided I love to wear them with jeans and a plain top for pub nights etc.