Green! I think it's a really nice color and as of right now I think my town's theme is going to be community-based so I didn't want to go too crazy on the color (although I know you can change it when you upgrade it)
I chose the aqua roof but it looks darker than it should and does not look like aqua at all. The aqua roof does look really nice with the default house though. It sucks to see that the pink roof is in the same situation. I guess a purple roof would be nice too. Hopefully there should be an option to change it once you upgrade the house again. It's gonna be exciting to see all the exterior options once we get further in the game!
I went with blue, as blue is my favorite color. It’s been building overnight, and I haven’t had a chance to check today to see how it looks, but I always go for blue on my AC roof.