Go for a colour.
You might find a warm "wintery" colour, like a deep red, or a holly green.
And don't "over-accessorize" with a dress like that. It has the bows, and the gathered waist. Those are pretty, but subtle. Too many accessories will draw the attention away from those details, and the effect might turn from "classic" to "glitzy".
In that dress, you will look very sophisticated, so your accessories should be kept under-stated.
And well done for getting an even better price! We should all take you with us when we go shopping. You seem to have an eye for a classy bargain.