If you're putting them on top of a gray patio, I would go with white or green.

I like the idea of white that would be nice with the trim on the house.

go for red or blue...there is too much grey and brown - its dull in summer

I vote for a fun color too! But, if you are going to go with a neutral, go with grey, and you can always add fun outdoor pillows.
As an aside, We stayed at an amazing brick rental house in Maine last week and the interior was so well thought out, but I was so bummed out by their brown Adirondack chairs. They could have done any color they wanted because of the brick exterior and they chose brown...and they were really nice chairs!

Lindsay, we're throwing colors at you when you asked about gray or brown. There's nothing wrong with those if that's what you want. If that's the case, I might go with the Dove Gray. Adirondack chairs can be fun with colors that pull more focus. I mentioned the white due to all the green grass and trees in your yard. Just thought it would pop more but so would other colors.

Given the rustic nature of Adirondack chairs, I would go with brown.

I have white and do not recommend them. They show the dirt.

There is a forest behind us! I would do a fun color if we were by a lake. But everything is rustic.
The the circle patio we are going to do will look like this. I don’t want to have too many colors in our backyard.
I don’t like white or greeen.

Your photo looks really nice!

I'd do brown, gray may just blend in with the patio.

I don't think you have to worry about having too many colors in the backyard. Yellow, blue or red would be nice, otherwise go with the brown.