Stay close to the color palate that you already have. Your roof looks brown, so gray will not be a good choice to use on your house. I would probably stay with the brown colors and for the house body, maybe a bit darker color than the cream you already have. Just looking at the existing house, should give you some great ideas. You have a beautiful house.

I usually have an 'each their own' perspective, but when I saw this, it saddened me. All that beautiful architecture molested by the idea of renewing and lightening something up. I totally understand the need to make houses more efficient, but why try to make a tudor what it's not... sell it and buy a different house! That original brick work had it's own natural colors and was beautiful! So was the diamond lead glass windows in the front that were not spared! I only hope as Debbie Downer mentioned that the appropriate methods were used because masonry is meant to breath. Liberties of paint shouldn't give the assurance of improvement. I feel a loss of culture and character when I see all these beautiful thing that lasted the test of time, covered up. It's like people who paint over the amazing grain patterns of non-wormy, American chestnut trim to modernize the interior.

Some of my inspirations!

I agree with Patricia Colwell and the others - remove the "Tudor" trim. I like the idea of painting the white stucco (after you repair it) to either the sage green or a color within your brick. pricklypearcactus is right about the sliding glass door entrance. Make that entrance a proper front door. Your home will be much more desirable when it comes to selling to have an actual front door (with sidelites since you have the room) rather than a sliding glass door entrance. Don't forget to put in a wide welcoming walkway and beef up your landscaping too like the insp pic below: If you go with the darker siding and change out the SGD, you could end up with a very attractive home (preferably without shutters!) like below.