It looks like it could be some sort of bacopa, although I'm not familiar with all the different types. That color, though, just doesn't seem right. Looks like it may have been exposed to cold temps somewhere along the line. If it doesn't perk up in a couple days, I'd call the seller.
Did you get any other plants in the shipment? If so, how are they doing?
Did you get any other plants in the shipment? If so, how are they doing?