Fair enough. Let's say that somebody (or even I) creates some newCaduceus textures, which the Dark Rainbow can inherit. Could that somebody propose incorporating those files into an update to the current OXZ, or would it have to be its own separate little addon?
So far, I've found the Caduceus textures, opened them in GIMP, and inverted the colour-values; and the white-and-pink result seems like a surprisingly decent base to work up an actual respray from. I'm still wrestling with how to get my copy of Oolite to load up the inverted versions, so I can see just how many artifacts would result from this massively-over-simplified attempt at a tweak.
I have to go offline for a bunch of hours for some errands; I have a sneaking suspicion that it's entirely possible that somebody here knows OXZs well enough to be able to whip up a simple colour-inverted Rainbow before I make it home; consider this post my permission to do so.
(... And now I'm imagining a separate "Sugarbowl" OXZ, with flufftext along the lines of, "A group of rodent sociologists have decided that it's Time To Be Awesome
. While they don't know much about ship design, they do know a few things about how to use psychological priming to nudge behaviour, and are leveraging their skills accordingly." ... And now I'm wondering just how many dark-grey, dark-red, deep-purple, sickly-green, etc ship textures could be simply similarly colour-inverted to near-white, growing-green, cheery-yellow, cherry-red, etc ones. ... Should I start a new thread for this?)