this is a really nice coop...your doing a great job...cant wait to see it when it's done... i am also building my first coop...going on 5 weeks and too much money... but it sounds like you're a little like me and like things to look nice and be perfect
The green looks terrific. Darker could be better. My vote is for the same color as the grass with either white trim or leave it light and have a bright raspberry trim.
You have done an amazing job. It is so cute I feel like I should come over with my sleeping bag and camp out with the girls!
Take a look at this BYC coop https://www.backyardchickens.com/web/viewblog.php?id=6791
It has the color scheme of green, white, and rasberry that K8tieCat described. I don't think your green looks like it is much different. Your coop is gorgeous. I understand why you want to pick the "right" color.