I think a stain that looks like naturally weathered wood. You know, that soft pretty gray color. With your native habitat you need to try to keep as many things looking natural as you can. You have white windows, but I would not paint anything else white. White native flowers and white stones. You could get some shade loving wildflower seeds, there is an online company called Nature’s Seed. I like poison ivy. As long as it is not touching me!

Wow...those outside window panels look like shutters on one of the pics, but I see from the other pic that it's a triple window. I like that your garage doors blend in so a simple non-paneled door would work in the same color that you have now. Or you could consider something with a modern flair: this one is wood and glass but I'm pretty sure you can get metal and glass Then change your front door to coordinate with the mcm vibe For landscaping, check in with the houzz landscaping subforum. I would go for low ground cover but that might not work with your restrictions.

I'm confused- I thought a storm door is all glass. Is the outside door glass or screen? If you have a screen door, In your neck of the woods, is a screen door important for getting a breeze inside the house and saving $$$ on air-conditioning? In your neck of the woods, is having your door open with the just the screen door closed important for that friendly neighbor feeling that communicates "Hi, I'm home, I'm approachable?" If so, keep that screen door. Being perceived as neighborly is way more important than how well people can see the color of your door. You can punch up the color with your plantings in front of the house and with hanging baskets hung from the porch ceiling. And you can still have your red door.

Any other colors or items changing on the house? Black shutters will be pretty classic in this case with the mostly white backdrop. What kind of door are you going with? Any glass in it?