There's a photo at https://babel.hathitrust.org/cgi/pt?id=mdp.39015080010120;view=1up;seq=634 that should help some (you may have to cut and paste the full URL to get to the right page). The inside bulwark appears to be white, though this photo was taken in 1903 and the colours could have changed by 1912. It's hard to see what is going on with the fairleads, but they might be mounted on pillars to raise them to the top of the bulwark. The area right at the stem is obscured so I can't say if there was a platform there or not.
Another Cunard liner from that period, the Caronia, had a small platform there, as can be seen in the photo at naval-history.net/WW1Memoir-Caronia91.jpg .