I don't know what Revere Pewter would look like with the browns you have, but I've seen pictures of it with walnut and calacatta marble and it look very nice. Buy a sample and paint a board with several coats and set it in the room to see if you like it. It is a Benjamin Moore color.

I am no help with colors, but I will advise you to prime the oil painted fixtures before painting them with latex paint. I once lived in a house with all oil painted walls. Back then, you had to prime them with oil-based primer to switch to latex paint, or the latex would simply peel off in time. Since I could not breathe oil paint fumes, there was no way for us to paint the house interior! Nowadays, I believe that latex primer will do the trick.

@Katie B. we put a large piece of black paper there to get an idea, but it was too severe. We also will be mounting a flat screen TV in the space as well. So if not black, which one?

Have you considered using board and batten throughout and having a single color siding? As for roofing color, black is universally harmonious. If black is not appealing, how about red? Perfect with the green siding.