(this is just to illustrate with an image, even though the answer was already formulated by DavePhD )
It depends on what you define as colour - a silver bar will be metallic-silver, however silver powder may seem gray (or even black in water) (see image: http://www.nbchangjing.com/upload/2009031714521679.jpg )
I recently performed this silver-compound reaction : $\ce{Zn + 2AgNO3 -> Zn(NO3)2 + 2Ag}$ After a minute you could clearly see silver 'growing' from the zinc wire that I added to the silver nitrate solution. The silver was powdery black, however when I 'flattened' the silver powder, I had a silver-metallic surface.
I even found an image of a similar reaction involving copper wire :

You clearly see that there is a grayish-black silver powder forming on the wire, yet this doesn't have the same colour as a silver coin, for example.