I don't have any brown, which is not unusual I suppose, and I wouldn't have had any green either except I needed green briefs for a Robin costume I put together for an "R" themed fancy dress birthday party.
Normally I also wouldn't have bought a Marco Marco brief as it is unlined and has no tie string. However for the sake of the costume I bought it.
It isn't particularly revealing even when wet, and stays up OK even when diving into the backyard pool, or mucking about on a surf beach. As it is lightweight and dries quickly it is ideal for wearing under shorts if you are intending to have a swim. I don't think I would wear it at a public pool or a family gathering, but I have worn it swimming at a couple of quiet beaches and a waterfall without feeling that I was being exhibitionist, and wear it swimming in the back yard pool when just my wife and son are around.
http://two.flash-gear.com/npuz/puz.p...930&k=76216154