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Whereas black tie comes with its own standard set of rulesthe style of dress has been the sartorial status quo since the 19th centurythe addition of optional is a relatively new phenomenon

Bargain: Sellers have started listing the dress on online auction site eBay after it sold out at Roman Originals First post: Caitlin McNeill, left, shared the photograph on a fan page dedicated to talent manager Sarah Weichel, right, who represents YouTube stars Even more colours: The dress can also be purchased in white and black or a pink and black combination Final say: This Twitter post by Adobe explains why viewers can see different colours in the dress With the photo of the dress, the surrounding colours are so muddled that the brain isn't sure what to make of the dress itself

On the days when you have to throw something on for the sake of convenience, nothing says understated chic like an all-black outfit

The embroidered jacket takes this much more casual than this skirt otherwise could be

The result is a confident, elevated look that works for dinners, events, or nights when you want to feel put together without feeling overdone