I love this drapey grey top from Lux with lace detail ($48). The back dips down just enough without exposing too much. Available at Urban Outfitters.
These studded grey pumps from Jean-Michel Cazabat ($495) are a little tough, but still refined which I love. Available at shopbop.com.
I love this cotton maxi dress in grey ombre ($125). Best of all it's made using 100% organic cotton, and non-toxic dyes. Available at shopintuition.com.