Okay so [link]
wasn't the final. I decided that any kind of Earth-tone on Daro just doesn't suit her. That's more Shala's forte.
Xen is cold and calculating and obsessed with technology. Very Imperial (as in the Empire in Star Wars)
One the left: Xen skin that I finished editing in GIMP and will use from now on.
On the right: old Xen skin I made from another by just sucking the color out of it.
Note: I didn't make this texture from scratch. I used one released for use with quarian models in Garry's mod and converted it and then edited it. To make the final changes I used the various painting tools in GIMP.