Lunch on the Amalfi Coast -- A Cool Palette

I started working on this painting today, which is of a lunch we had on the Amalfi Coast a few years ago.  It's got a Vermeer level of contrast with brilliant sunlight coming through the window to a very dark room.  So far, I've put in the darks (and they are dark!) and lights and am finding the middle values.

As to the color, the Foundry Gallery is having a show in December entitled "A Cool Palette" and the works in the show are going to feature the blues, greens & purples of the cool side of color.  My plan is that this painting is going into the show when it's done.  I am going to take it as far as I can without a warm yellow, peach or red, although I may put a little warmth into the sunlight.  We'll see.  I'm also -- and this is actually going to be kind of inevitable, since my reference photo is not great -- going to resist a whole lot of detail.