The well known photo of the corridor on Olympic during fitting out at least offers no doubt that the Honor and Glory Game First Class models are not accurate. Clearly the walls are white, even if this photo may show an undercoat rather than the finished wall color. The detailing and carving is wonderful and elegant.
Actually that photograph show Olympic's stateroom C 58 during fitting out. It has been mistaken as a photo showing 1st class corridor because of the absence of furniture and wall decoration.