Today I commssioned a double breasted, midnight blue barathea, 12 oz. dinner jacket from Lesser's formal wear book. Turns out that my tailor - William Field - tells me that the the corded silk lapel facing I want is only produced in black these days, so black it shall have to be. My question; what should I do with regards to the bow tie? Should it be black gosgrain (matching the lapel facing) or midnight blue (matching the coat)? My instinct is "black," but I'm sure there is a rule out there somewhere that provides the answer. Thoughts?