Matt on the cupboards. And colour match your white paint to the cupboards so that there isn’t a clash.

Natural white should work with the oak. You can always repaint the back of the door if it annoys you, In my bathroom I have similar colour scheme, with lexicon half on some walls, white textured tiles under window opp door, mid grey tiles some walls and floor and white ceiling, my door, trim and windows are painted in vivid white. I must say I had to go check that, as I don’t even notice it is different to the other side.

I haven't seen Lexicon white, but someone I know has just paint their living room in Terrace White. It is noticeably grey (I would would actually call the walls bluey-grey, but the have mixed hardwood timber floors and a tan leather lounge suite and it looks great with those colours. I was actually surprised at how good those colours went together. I personally am over grey to consider it for my own property, but it did look beautfiul. I have another friend that has painted it on the eaves of her house with the house being vivid white. I thought it was a bad idea until I saw it. You can barely notice the grey tinge when used as an external colour. Again, it looked lovely.

@wendyec I think he is suggesting it for the contrast; but the more that i think about it, I dont really want a contrast, I just want a nice clean white canvas. Our living room is a bit darker, and the lexicon half looks a bit blue in that light, which i definately want to avoid. We have lexicon quarter in our current place and it looks white and not too cool (even though it is a cool toned paint). Think we’re going a semi gloss acrylic so the yellowing should be less of an issue regardless