Any light blue or gray cardigan would work with this look. I'd bunch up the sleeves, wear it slightly open and belted over the dress. Top it with any coat... I just love this pop of color.

These shoes can easily be swapped for boots and any one of your beautiful coats can be worn atop. The sweater does cover the pretty ruffle detail of the dress, but this presents a warmer, slightly dressed down option appropriate for any occasion.