Yes the silvery one looks like a blue, not sure about the brownish one. It might be a very pale chocolate, or does it looked ticked which would make it a cinnamon?
Im not sure though, its a nice shade. Show standards ask for chocolates to be as dark as possible (dark chocolate not milk chocolate) so thats what Im working towrads with my chocolate rumpwhites but really I prefer a light chocolate.
The colour does look a bit like a champange although champagnes have pink eyes. Champanges are genetically a chocolate mouse which has pink eyes and the pink eye gene makes the chocolate colour of the coat much paler, so I guess that fits in with it being a very pale chocolate.