They ('they' being the fashion arbitors) say that midnight blue (true navy blue) looks blacker than black under artificial light. And I wholeheartedly agree that a navy/midnight blue dinner suit is much more elegant than a black one which will look greyish. However, I have seen (on TV and in some men's style books) some pretty black black suits. There was no hint of blue, but the black looked rich and beautiful. So is this just expensive cloth? Or what? Yes, in the brightest studio lights, you could see some greyish, but it was a shimmering grey and fit very nicely. Perhaps someone could tell me if black can be black if done in the right fabric? And for the record, I think that a black suit is just as good as a grey or blue one. More formal of course (as a morning coat is often black and it is the most formal garment), but certainly in this day and age a little formality is needed now and again.