We are deciding bridesmaid dress color on Sunday and I know my girls will immediately ask about shoe color.  The dresses will either be a deep purple/plum color (sangria) or a dark brown (mocha, chocolate, or espresso)  I know that nude will go well with anything, but is nude too...brown to look good with purple?  I know neutrals like brown are supposed to match anything, but I always picture silver or black with purple.  However, I feel that silver is too fancy for the casual vibe of my wedding and most of the time if you aren't in high school or attend military balls/galas/benefits regularly you won't be able to get enough wear out of a silver shoe.  Is black too dark for a fall wedding and/or would nude work well with purple?
Thanks ladies for all the help!!