Not likely but we already saw a green and a purple variant.
Though would it be more or less likely that the VUX develop their sensitivity to aesthetics in case they do have chromatophores?
I mean, when you're stuck with that... utterly repulsive shade you call "pink"... you have to assume a species sacrifices some sense of aesthetics just for the ability to tolerate the... *urk* sheer ugliness of it's fellow citizens. Anyone with a true aesthetic would have to seclude themselves in a cabin and avoid mirrors. (/vux)