That is a very cool trailer and I'm all kinds a jealous and its not like it matters what I think but givenyour vehicles and propnsity for mil spec, how about a nice deep olive/forest green.
I'm still exploring options to mount my solar panel. I want it removable to be able to park in the shade and sit the panel in the sun. I have a couple T-tracks that may work. I just need to make a couple brackets.