So I ended up asking Esther Walker how to choose a colour for the hallway (through her blog) and she told me to just go right in to Farrow and Ball and get them to tell me what colour we should paint it.
Anyway, the stylish French dude told me to forget all the colours I’d listed earlier (he said it politely but I got the message). He suggested Wimborne White and Ammonite. I was a bit surprised but frankly choosing colours that aren’t too dark will go down much better with my husband. God knows when we’ll get around to it though.