The spicy red highlights the roof peak outlines windows accents the front door and defines the porch trim.
Tan house with dark roof.
This contrast needs something to help bridge the two colors given the classic design of the architecture.
This is a popular choice and almost always bad.
Instead you have a peaceful appearance that blends in perfectly with the style and architecture of the house.
If you want to go the traditional route stick with gray brown or black shingles.
White pops up as window sashes to bring dimension and brightness to the facade.
Grey brook 5001 1b valspar.
I too love the idea of a dark gray house with white or ivory trim but if you are attracted to lighter combinations those will work too.
Black can be too harsh but will work in limited situations.
This produces a calm quiet appearance for the home.
You can also choose to incorporate a mix of colors like gray and black or tan and brown shingles for a staggered effect.
In this case the siding of the home is a light tan while the shutters are several shades darker.
For a contrasting pop of color opt for reddish orange shades or lighter tan colors.
A soft muted brown or the right color grey are your best choices.
Yellow with a strong brown roof is a very common mistake.
While the siding is a light warm tan the roof is a darker cooler gray.
Tan shingles with a tan house.
To be honest i would choose a tan if you had a brown or even a black roof but i think some of the colors that lefty has suggested would work better and look more interesting with the pewter gray roof you have.
This is done by using a classic white trim and white shutters that can help keep the siding light while also adding a cool toned touch to tie in the roof.
These are perhaps the trickiest color to work with.