Well this article on Soldier Systems is talking about the new issue plate carrier, it doesn't mention the colour but the picture are in MC.
But the product spec lists BK, CB, KH, RG, UC, MC and even ABU! But your probably right on the coyote front.
EDIT : forgot to add the link http://soldiersystems.net/2011/02/25/eclipse-rbav-af/
Product spec for RBAV http://www.scribd.com/doc/49512327/RBAV-AF