I just remembered I had a photo laying around from a friend's wedding. I am not wearing a black cummerbund, but instead a POW checked one. I think the substitute is fine, and just wanted to show an example. I also have one that is a grey/white mini hound's tooth and I think that is fine too. The camera angle, and quality of the image is unfortunate, but the picture was snapped candidly in dim lighting. You get the idea.