This is Pretty Serious VT100, mattified:
on PS's website (and that's not an affiliate link, just so you know). I had on Nail Nutrition and Orly Bonder underneath, and put a coat of NYC matte topcoat on top. (I went to buy a spare bottle the other day, since I've been using it so much, and it was $1.72 at the grocery store. You can't really beat that!)
(Also note that VT100 is marked down, which I think was why I bought it in the first place. If you want it, it's probably wise to grab it while it lasts!)
Before that I had on Nail-robi and Flake Your Booty, which is the blue flakie, and I mattified that also, but I never did get a picture of that manicure. It's been raining all week so I haven't had the light. The picture above is from the iPhone, in the car. It was raining but it had let up enough at the time that the light wasn't too awful.
Nail-robi looks like a navy blue on the nails to me, with maybe just a hint of purple, but on a cotton round when I took it off it was definitely purple. That always interests me when that happens.