I bought this in the 8x10 size for my living room.  The colors are the exact match as in the pictures, if not richer.  Its absolutely perfect for my color scheme.  I dont require a grip mat underneath, since furniture sits on top at precise points.  As far as any chemical odor, there wasnt one.  If youre mulling this one over, stop.  Purchase it.  Youll be glad that you did.