It seemed like everywhere I went in Paris and London last month I couldn’t swing a baguette without hitting someone wearing Yves Klein blue. With more depth and richness - and just plain pop - than your average “royal” blue, this color looks fantastic when paired with black. It’s a great way to add a bit of juice to your “all black all the time” urban uniform. There was also something about the dull light of Europe in winter that caused this color to look positively electric when set against grey skies.