Someone earlier mentioned using this idea with navy and grey, with less conservative styles - and I was in the middle of that exact capsule wardrobe project! Here it is...
Navy pants and tops – J. Crew, navy mini – A.P.C.
Grey layered tee shirt – Romwe, Grey jacket and skirt – Vivienne Westwood,
jeans – 7 for all Mankind
Print silk blouse – Otte, Striped long-sleeved tee – Muji, tee shirt with printed cuffs –
Comme des Garcons, hummingbird tee – Jil Sander
Scarf – Roberto Cavalli, Jewelry – Miriam Salat, pumps – Stuart Weitzman