Both sizes can be had with a black dial or in a more interesting color inspired by Le Corbusier, a warm green for the 36mm and an excellent grey-blue for the 40mm. Both colors are distinctive, work beautifully with the steel case offering, and make for an entirely different feel when on wrist. I was floored by the blue dial version of the 40mm, the combination of the color and the way that light interacts with the bubble-domed sapphire crystal is beautiful and, to my eyes, makes the most of a very balanced and legible dial layout.