http://new.photos.yahoo.com/sedoniar...60762350990493
Here are some of my photos. Unfortunately a HD crash ate all photos of "old gold", but at least you can see my concept of a contrasting edge that bleeds but doesn't muddy with the other color. Old gold is a muted gold that approaches a real metallic gold. The golds in the photo album above are NOT the one I'm thinking of -- they are all yellowy or orangey.
Your costume is mostly blue with some gold, so a veil in mostly gold with some blue would be a nice contrast I think, and would provide contrast regardless of whether you are against a dark or light background.
Sedonia