Revlon Midnight Affair is a deep shimmering navy blue, if you look closely enough, the color is actually a semi-opaque black with a ton of blue shimmer, there are so much blue in it so the overall effect is a deep navy instead of navy-black. I have no complain about the color as it's quite rich and beautiful (although this does shrink my nail bed a bit).
The formula isn't too hard to work with either (but I feel it's a tad loose that it has a tendency to run into my cuticles and make a nasty mess) as it's has the similar texture to that of shimmery Wet n Wild (a lot better than Maybelline, ahem)but definitely not as nice as Barielle or China Glaze.
The deep navy makes a very pretty and somewhat formal manicure, like the one you would (could) wear to a ball. No close up available because I made a big mess applying it (and this is my third attempt) so this is allover my cuticles. The fatal flaw about Midnight Affair/Midnight Madness is that it's the most squishy and slow-drying nail polish I have ever tried (The Squish Queen runner-up is Revlon Coconut gag but that one went gunky because I bought it without realizing that it has been opened up and tested by some cheap XXXXX), it was like I had to apply it right before taking the picture so the manicure wouldn't get ruined on the way from my bedroom to the balcony, which is like...5 steps away?