Beautiful view Jane, gosh you're on the side of a mountain no? Yes if left natural the cedar will weather to grey but to me that looks weathered & dry & possibly not in keeping with your house style. I still like the red door & think the cedar weatherboards look to be in good condition. I would start by painting the gutter & fascia in the graphite, then the pergola as well & lose the cinder if that is the light colour. Funny thing, I live in a pole home too but without your amazing views!

If you're trying to be true to the 80's build of the house - they'd work, otherwise there are great outdoor tiles that replicate stone that are timeless. If you go with a sandstone look-a-like you'll get the warmth from the honey/brown colours but you wont be set with a look of a particular era. I would avoid natural sandstone as they're a lot of work to keep looking great.

I'd go slate..if you're going to go light render..it will contrast nicely.. light roof tiles tends to date.. cloudpants the second house look gorgeous..

What ever colour you like is what you should go with - I have a black roof and a white house and white down pipes and guttering - the plastic type. All I notice is how dirty is looks when the winter has set in and been and gone and you are left with green mildew on the guttering and down pipes. If I have a choice and it suited my house I would go for a dark colour - however if you are going to tin you will want colour steel as the sun will just bake black or dark paint. Also look at the life time warranty of both the plastic and steel to determine which may last longer and be cheaper to fix longer term.