Finding the right wedding guest look can feel like an impossible guessing game. Like, as if black tie and cocktail attire restrictions weren’t difficult enough to navigate, we’ve unlocked a whole new level of dress codes that practically require a translator to understand. What exactly are the do's and don'ts of "garden chic" or "beach formal" anyways? While there are a few hard-and-fast fashion guidelines you should remember for any dress code—like the obvious don't wear white to a wedding and try not to upstage the bride —you might need a little coaching on the rest. And maybe even a refresher on the those common sense guidelines, too. Cough, off white is still white, cough. To make sure you really nail it on the big day (well, not your big day, but you know what I mean), we chatted with Elaine Swann , lifestyle and etiquette expert and founder of The Swann School of Protocol , to give us the 411 on the spoken and unspoken rules of wedding guest attire.…