The answer to the colour is here on another dilemma, Resene Stack [Colour used on this house[(https://www.houzz.com.au/discussions/could-you-please-tell-me-the-colours-used-on-this-house-please-dsvw-vd~1274539?n=4)

@jmm1837, My appologies firstly to the author for being off topic. One house I lived in didn't have plaster anywhere, just pressboard for walls, the stuff notice boards are made from, so we wall papered as paint soaked in by the bucket load. then lived in a caravan and now a little relocatable cottage, a glorified caravan without wheels I say but now hubby and I are building our dream home, I have no decor or design education and have simply done my best with the plan and now the build. Great advice about making the home, warm, comfortable etc...and I'm doing what I want and not following trends BUT unfortunately at times I am truly paralized by indicision, too many choices of everything from interior colours to simple door handles and when I put my head down to sleep, my mind goes into overdrive, sleeping at times only a few hours a night ha-ha Still enjoying the process but it isn't that simple to follow your suggestions!!! I'm sure as the home progresses, with less decisions to make, it will become easier.

I'd paint all the ceilings with a flat ceiling white.

I don’t want to paint the beams I want to paint in between them but as my walls are beamed and the ceiling is vaulted I don’t know whether the whole room has to be painted the same colour or I can paint the ceiling one colour and do the walls in another.