As long as your blazer dress is long enough to graze your fingertips (i.e. doesn't actually look like you forgot pants), it's a yes in my book. Shop for more demure colors, like black, red ...
Even Diana Vreeland, that legendary arbiter of taste, is no help here. While her aphorism that “unshined shoes are the end of civilisation” still holds, her advice on black-tie dress code events is ...