I don't think any stations on the West highland /C&O lines were ever white and blue. Very few Scottish stations were White and blue. The above looke about right for steam era but on most wooden buildings the below window ledge area was usually brown. In the early sixties, C&O stations were painted in what were described as 'Pastel' colours Pale blue pale pink ect. some were also green. I think West Highland stations were originally cream with dark blue framing or green. In the mid eighties they were an 'Interesting' two tone green which didn't have universal approval. If you are modelling Strachur, remember that James Bond (AKA Sir Fitzroy MacLean) was the landlord of the Strachur Inn