Gazebo Decorating Advice

That's tricky, as I wouldn't see how you would be able to cover it without a serious project. I would keep the decorations on the gazebo as neutral as possible if it really bothers you, creams, whites, gray, etc. But IMO no one will notice regardless, they will only notice you and your decorations and your wedding

I'd lean in to the dusty rose and blues, those will compliment the gazebo. Then the sage green can really come in for the rest of the event