According to some ancient manual of fashion faux pas, black and navy are not supposed to go together. I happen to disagree.
Unless you have intensely dark navy that might as well be black, I maintain that these colors play off each other beautifully – especially this time of year. Behold my shining example by Zandra. All cut, etc aside (which I happen to like but may not be for everyone) this is a perfect reflection of how black and navy can live in harmony.