many models of the eagle are to find, but of course if at all i do my own.
to the "clean" look, yes especially as what i am these colourless bases i found the very ugly to. especially if you think that you will have to live in a not very hostile environment, colours would be unevadeble.
industry had made such experiences since long, and some like CIBA (novartis now) had used colours in their production halls since long.
but it needs a good artist with a clear thinking about colours to do so, you will have to know a lot about psychic effects of colours, because it can "hurt", if you don't respect all aspects of it.
i know this is used widely in all especialy media like movies and tv series, but even train interiors had to be coloured respecting that. unfortunatly the goal is not allways to make things comfortable. e.g. the swiss rapid trains, are coloured in a real bad way compared to the ones from the 50's and 60's, why?
simply because they don't want people to feel comfortable in a rapid train, though it it's colours are grey, cold blue and a citric yellow, which is in my opinion ugly. but that is wanted, leave the train as soon as possible and don't feel like home, don't talk to loud or laugh, thats what these colour do in the mind of a human, ugly colours, ugly thinking, imho.
i think a moonbase should respect that to and even our fellows in the iss should profit from that. it's something "unseen" but very important for the human mind.
to the "clean room" environment, it's a argument, but on the other hand it's no nuclear power plant, it's a space station and you not only work there you live in it. it's true they will be assembled in such a clean room environment, but i guess it doesn't have to stay that, except for the lab part of a station (sporadically i worked in a npp).
another simple reason for a white hull is the temperature, but only for the hull. anything else gets extreamly heatened up in the sun, whithout a surrounding atmosphere to level it.
finally you can say you can use colours for the wealth of humans or against, the goal decides.
don't forget i'm educated as a fabrics printer/dyer, i know what i'm talking about, colours was my job.