Lily Kwong (and I'm not sure who the other lovely lady is),  after Jason Wu (I think), NYC, September 2015.
A chic way to accessorise an elegant, very flattering monochrome look: add a headscarf/turban and coloured pumps. 
Recreate Lily's look (kind of):
Not quite sure if Lily is wearing an oversized shirt or a slightly heavier unstructured jacket... either way, a crisp oversized white shirt would work beautifully here. 
Oversized shirt/jacket — Helmut Lang oversized cotton poplin shirt, MiH Jeans cotton-poplin shirt, Selected Tima oversized shirt, Ayr The Easy cotton poplin shirt,  6397 Oversized collarless shirt, Victoria Victoria Beckham Oversized boyfriend shirt, Georgia Alice GA classic shirt, Tome oversized striped cotton-poplin shirt, or ASOS Longline oversized white cotton shirt
Cobalt blue suede pumps: Christian Louboutin Pigalle 85 suede pumps, L.K. Bennett Fern suede point toe pumps, Aquazzura Allure suede pumps, J.Crew Elsie suede pumps, Tory Burch Elana suede pumps, Charlotte Olympia Monroe suede platform pumps, or Gianvito Rossi suede pumps