I don't think you can find a patent navy in stores anymore. I'm pretty sure it's sold out.
It does look like navy patent in that picture. Maybe they're bringing it back for S/S08. Or it could be that new bag that's a double reissue that I described in the other thread.
http://forum.purseblog.com/chanel/here-it-red-patent-2-55-s-s2008-230536-2.html#post4863339