I like them all. Plus, as Per said, most certainly there will be anoption to adjust this to our likening. For someone like me who is not an artist, it's interesting how slight change of color can alter whole perception of the world that we are imagining.
I wouldn't like to see changes in original inxile idea (whatever that is) to the point they loose the thread they would like to follow. I don't think this shade of colors could be it and indeed, there is a place for crowdsourcing, but compromises with a "fans", for better or worse, aren't always the best practice. That said, I genuinely believe Brian&Co know this and if this color palette "issue" happens to be the only/major problem with the game, I would be one little happy scout.
sp/