Lanvin Draped and Gathered Fitted Dress in Black. Looks navy blue to me. But I love the design of this - would be perfect for work during the day and then attending a work function/dinner in the evening.
If you need to find me today, I'll be at my computer staring at this picture of Olivia Culpo. I find the former Miss Universe (and girlfriend of Nick Jonas) is so stunning that at the John Frieda Beach Blonde event when she walked in last night.