I took it humorous and a moment of being genuine as well as caring. It could be seen as inappropriate I guess but that is missing the context and exchange that happened around it. Perhaps they are not supposed to comment on your appearance so then I could see it as inappropriate. I would feel a bit strange if this happened with me, but we don't have moments like that. Or if we do they are only verbal and do not involve action. If you are okay with it, then that is what matters. You don't need a bunch of people on the internet giving outside judgements when they don't really know.