I think the groundcrew would be in faded khaki, almost a biege colour, but dirty! Possibly the same, but olive. Not sure on Navy ground crew then, but I think again it would be the faded khaki,or faded grey. From what I've seen in photos of the time, the dress regulations seemed rather lax, probably due to temp/humidity, and all manner of kit was worn. I'm just waiting for a DVD to be returned, which might have some pics that might help; I'll post shots if there are.