I'm told that the white/gray/black "shadow patern" shown in ctdonath's reply was originated as a winter camo for US Armed Forces. I feel this explanation is quite logical. You very seldom see unbroken white, even in areas of heavy snow. There are always rocks, bushes, clefts, shadows, etc.
I've seen some similar patterns that look to have been dyed light blue. Friend has a pair of such BDU pants he calls his "Shark hunting camo."
And, as some sort of "fashion statement," I've seen the same with backgrounds of lime green, dull red or orange, being sold commercially. I like it. I take it as sort of a spoof on those who wear woodland camo (which has obviously never seen field use) around urban enviornments.
Also--Some people miss the point of BLACK BDUs--This is not night camouflage. It is for intimidation and terrorism. Sometimes it may be called for. It mostly irritates me. A lot of law enforcement entry teams have gone to a medium gray or the "shadow camo." It works well for breaking up outlines in an urban setting, especially in dim light, and doesn't seem to pi$$ off the citizenry as bad as the SS black.
As to true urban camo--Travis's comments about gray suit and tie recalled to me a comment by a friend. He is very basic and serious about his field craft and is not given to putting on airs. First time I saw him in blue blazer, gray flannel slacks, white shirt, and tie, I commented on this being out of image for him. He 'splained he was doing some work in downtown Dallas, and this was simply urban camo, so he could blend into the background.
While choosing your suburban attire, please remember that the true "Dockers" line is made by the Levi Strauss company, and they are very pro gun control. Lots of other good chino pants out there without patronizing the enemy!
Best to all--
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---The Second Amendment ensures the rest of the Bill of Rights---
[This message has been edited by Johnny Guest (edited October 15, 2000).]