When I ordered my dress, which is an off-white, I asked the designer (who happened to be there for a trunk show) about clashing whites with the groom. I was worried about his white shirt and the designer stated that you are never going to be able to match whites perfectly, not to worry about it and that this should not be a concern. As another poster stated, they are all just different shades of the same color family. So, my half a cent is you'll be gorgeous and it won't look funny at all. Good luck!