I've recently seen a new house with the same grey paint on the body as your home has, crisp white trim, and a yellow door. It's a beautiful combination and very fresh looking. I don't know the exact color of yellow but it has a creamy butter tone. Good luck, your home is beautiful.

I agree with kimdegroot, yellow would be great :-)

idianpatti's chartreuse is so cool! If its too contemporary for you then I would choose the yellow. Either would look great and (imo) better than red. Great exterior color choice!!

The picture of your door is quite tiny..... from what I can see, I would also suggest painting the lower section of the panels on either side of your door in whichever colour you choose. It will have more impact and make your door look wider. If you want a deeper red, I would recommend Sundried Tomato by BM. Good luck and have fun! :)

Here's the image: