Mirens Inc. I love the idea of using grey. I would go dark though like the brick to the far right of the photo. The one at the same level as the door handle. If you have room in your budget the sconce could be updated to a dark grey metal one with a flatter profile.

Another vote for periwinkle. It's just so unexpected. Take a look at Behr paint periwinkle colors P530. Normally I'm a Benjamin Moore kind of gal when it comes to paint but they do not have any blue violets that I like. The color Integrity on that strip might work for you it's number five.