Gentlemen... I've tried a rather extensive search, so forgive me... I recently purchased a very nice 2 piece lighter grey suit, and I was curious about vests. I know the general rule of thumb is that they need to be obviously different in order for it to work, or exactly the same. My question is, is "gray" a color that contrasts with "light gray" enough that this may be worn? Or am I risking too much? I'd provide photos, but the suit is at the tailors currently.