As usually in these cases, I consulted my facebook groups. As sociologists know, the answers you get depend on the questions you ask. I asked: What colour do you think the doot should be, white or dark or dark with white surrounds?
Guess how many different answers I got? Most voted for white, but there were many great suggestions, and many pictures. Interestingly enough, there were different trends in different groups. Can it be culturally dependent? Anyway, I wasn't wiser after that, but then one clever person said: Why don't you cut mock doors from cardboard and test different colours? Now, that's what facebook groups are for!
I cut a very crude white surround and painted three different doors. I made a green one because there was a very strong opinion on green.
I now worded my question differently: Which of these doors do you like best? This time nobody voted for white! Isn't it curious? You really need to see it before you can decide. So I dismissed white, and since I wanted the door dark oak from the beginning I made it dark oak. It took five coats of stain to make it this dark, and then I gave it a coat of varnish.
The door handles are pieces of junk jewellery, and the knocker is a bit of an earring.
Now you may ask why I am making these finishing touches when it will be months before I get anywhere near. The answer is: a reward for painting windows.