Here is a photo of them, basically it is a random pattern, the back looks the same as the front.
The IBA (Intercepter Body Armor) is currently available in Woodland, 3-color desert camo, and the USMC still uses a dark sand color overall.
Here is an articel on how to paint them that has some photos of the actual DCUs that might help too.
http://www.armorama.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=145
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