a long silver necklace with peals and jewels look really nice with this colour and style dress buy from primark or new look. in your hair, a cream or red flower would look cool and tasteful but not too much, buy from, new look or primark.
i would wear dangly diomand earings, or none dangly. necklace would have to be another silver of some sort, maybe with gold on it also. bracelets that are also silver would match finely with a cream...