Go to your favorite tree on the property, with green paint chips in hand, and find a match. :-)

I agree, go with a nature tone.

What style is the house? Modern? Traditional? Transitional?

What climate zone?

Full sun? Shaded?

I ask these questions because I can't suggest colors for siding without knowing more.

When I purchased my 1939 fixer, it was painted yellow, and when the west/southwest sun was shining on the front, I couldn't look at it due to the brightness. I painted it a cool grey with navy shutters (and my shingles are a similar color as yours). Had my house been under shade trees, I would have used a different color. I'm in North Carolina, so I also took my overall climate and my neighborhood, the style and age of the house into consideration.

Sounds good.