Date for Q
http://www.uscc.com/uscellular/Silv...tml? »
phoneID=161
http://www.uscc.com/uscellular/SilverStream/Pages/b_ ... »
On my last it didn't include the last part of the link as a hyperlink...so, if this doesn't work just copy and paste the above into your browser.
Anyways, to answer your question it appears on this link as Gray, same as the Sprint & Alltel color listed on the Motorola website.