Hi Chris. You might try a winter white cammo job. I'm afraid going grey limits the cammo jobs you can do. I really haven't seen any grey color combo cammo jobs. Closest I've seen is desert yellow with grey patches coming through it in North Africa. As far as the interior, I believe it would be grey. Good luck.
"It is well that war is so terrible, lest we grow too fond of it."-R.E.Lee