I am about to tile a sub surround in a full guest bathroom. I have white (not beveled) 3x6 white subway tiles. I am trying to decide between a white color grout or oyster gray. I was pretty set on oyster gray, but my fiancé seems to like the white. We will be painting the bath Palladian blue and our cabinets are white and the vanity top is gray for now until we update the vanity top or entire vanity.

Thoughts?