Glass and Breakwater

We are getting bookshelves made for each side of our fireplace, and have decided to paint the back panel a colour, whilst leaving the shelving and cabinets  an antique white. The original plan was wallpaper but  I haven't found something I love enough. So what colour?! Must be cool, as the rest of the room is cloaked in various pink and red ikats and kilims. The finalists so far are Lake George, Glass and Breakwater by Porter's.

I also think our wolfhound/blue heeler mutt Boyo deserves a portrait above the fireplace, a la above...

Images from Lonny Mag. HF.