check these out:
http://forum.purseblog.com/marc-jacobs/mbmj-dark-portobello-vs-mouse-gray-can-anyone-324452.html
http://forum.purseblog.com/marc-jacobs/anyone-own-a-quilted-stam-hobo-in-mouse-235104-2.html
http://forum.purseblog.com/marc-jacobs/emergency-i-need-grey-bag-but-one-help-257564.html
http://forum.purseblog.com/marc-jacobs/stone-or-mouse-teri-totally-confused-238783.html
http://forum.purseblog.com/marc-jac...the-difference-between-mouse-grey-242876.html
http://forum.purseblog.com/marc-jacobs/yay-for-grey-my-mouse-grey-faridah-242264.html
http://forum.purseblog.com/marc-jacobs/mouse-grey-color-239728.html
http://forum.purseblog.com/marc-jacobs/mouse-color-143004.html
http://forum.purseblog.com/marc-jacobs/need-to-decide-fast-chestnut-mouse-stam-hobo-113703.html
http://forum.purseblog.com/marc-jacobs/stam-colour-mouse-what-do-you-think-82802.html
http://forum.purseblog.com/marc-jacobs/pics-of-my-new-mouse-stam-hobo-69571.html
there's a mouse grey in MJ and MBMJ. it's a taupe-ish grey color. if you do a search, there's some great threads on mouse grey stam hobos/ east west stams and the dr. groove/teri bags in this color