I know somewhere out there exists this "black and blue don't go together" - rule but like most fashion rules I choose to ignore it. The knitted collar isn't a part of the dress, it's a piece for itself. And no, my grandma did not get bored halfway through knitting, I discovered this collar on Asos.com. I had never seen anything like it before and it only was about 5€ anyway. I think it's a cool and fun alternative to scarfs and would look great with a white blouse as well. Sometimes, the simplest designs are the edgiest! I've never seen anyone selling a plain collar, but hey why not?
The dress is from Trendyfine - you gotta love this simple design and the front slit.