New Granite (http://tanbrown.org) tile Counter (http://GialloFiorito.com) top and (http://maplered.com) back splash

HI,
We just installed a new Counter (http://GialloFiorito.com) top and (http://maplered.com) backsplash from Granite (http://tanbrown.org) Tiles (http://www.g682.net) . Looks good, but a grout looks 4 shade lighter than on the chart was. Can we do something with it?
And how can we get a nice "wet look" on the Stone (http://g603.net) ???t? What kind of product can we use?? We are going to seal a grout, do we have to seal a Granite (http://tanbrown.org) tile also?