I just did a Live Chat to see about the wrong color dress. The Cobalt color is back in stock, but in order to get it at the same price as the Veterans Day sale, I have to call in. And then of course return the other dress in store, which isn't convenient. I assume we'll be in the city before Christmas, but most likely DD18 will be with me. The dress is online only, so I can't try an exchange in store.
I might ask DD15 her opinion on the color, whether the one we have in hand is good enough or it's worth it to try ordering the brighter one. Also I guess wait until the rest of the orders come and see if there's anything else wrong!