I think I'm late to the party on this one, but I am currently obsessed with the blog (and shop!) Little Brown Pen. Nichole lives in Paris, where she and her husband stroll the city and photograph it by color. Scrolling through her blog is incredibly addicting. Here's just a peek.
A lot of her best photos are available for purchase (grouped by color, of course) in their shop. Now, which color to choose?