The new gray color - Gris - looks sorta gray-greenish in the Look Book. It's a nice color. Regarding the Look Book -- just ask your SA if you can see the L.B. It's there for customers to see the upcoming LV's, but you have to ask to see it.
I'd say it's lighter than the mini lin grey, I wasn't a fan of the grey maybe it was the picture but it looked grubby to me.
Dear all, pics of the new rose & grey:
http://bagaholicboy.blogspot.com/2009/03/bagaholicboy-news-73-new-monogram-denim.html