There is a natural elegance about traditional black tie which needs no introduction. It has survived as an institution for so long because it elevates men in the most tasteful and understated manner and without distracting our attention from the femininity of a woman who might be in the presence of the man. This works for same sex couples too. I am inclined to feel that if one goes black and white, the other ought to go peacock.
Shop either black tie or peacock.