Which dress should I wear?

Question

Going to a friend's wedding at the Spanish Oaks Ranch. It's at 4pm. Should I wear the more simple blue dress or the flashier gold one?

Spanish Oaks Ranch

http://spanishoaksranch.net/

Blue dress

http://flickr.com/photos/l-marie/2825609861/

Gold dress

http://flickr.com/photos/l-marie/2825609417/