I don't know where you live, but gray, white and blue is a typical theme in Nantucket which is beautiful anywhere in the country, IMO. See the link below that friend just sent last night, to another friend who is painting a house in WA state.

The painting friend is doing a gray body with black shutters and thought of doing the door in black also. She is now reconsidering since she has seen these blue doors in Nantucket.

Here is a link that might be useful: Nantucket blue doors

Our house sounds much like yours and we stained our porch floors and ceilings the same color as our wood floors inside. It may be too late for that for you, but maybe a gel stain? I don't know if they make a weather-proof gel stain...

We just bought a house on Cape Cod. It has gray clapboards on the front with white trim, the back and sides are weathered gray shingles, the deck is stained brown and looks good. The only thing we are changing is the front door, which currently is black. We are painting it blue, as my3dogs suggested. It is a good combo in this area-not sure where your house is located. Post a picture and I think you will receive more suggestions.

I have a gray house with white trim and am going to paint my front door yellow. I need something to brighten up that area. The covered porch makes the current color too dark. From the street you can not even tell what color the door is.

What're your summers like, Nancita? What exposure does the porch have and what do you use it for? For our front, north-facing walk-in porch I chose a traditional Charleston green, a regional color which is almost black, for a deep, cool look that would harmonize with the lighter green foliage all around, but we were forced to go light on the porch we sit out on because the summer sun on even a medium green here will make it too hot to walk on.

I noticed on browsing the web that current front porch floor colors are typically deplorably limited and boring, but I would think any color that was considered generally acceptable for a front door could be used in a somewhat muted or darkened, or perhaps lightened, version without raising eyebrows.

For back deck color, you're outside but still separated from "nature" while sitting on it. Would you like a look that reinforces the shelter feeling (interior-style elements and colors carried outside), or would you like to embrace nature more and feel more as if you were sitting in a park or woods, only without your chairs sinking in? :)

I vote for a dark brown like bonnie and angel suggested.

I like the idea of the porch/deck looking more like real stained hardwood vs. decking.

I had dark brown on my deck in my last house and it was very easy to keep looking nice. I've seen gray and white stained decks and over time they get dirty and dingy.