How will sealer affect color of slate mosaic Tiles (http://www.g682.net) ?

I foolishly bought some tile online that isn't quite the color I had expected. While it looked a soft aqua in the online photo, it is in reality mostly grey. In the photo I'm attaching, it looks a soft blue. I'm debating whether or not I want to use this at all.

In the photo, the left tile is sprayed with water, the right is dry. Will a sealer darken the tile as much as the water appears to? Is there such a thing as a sealer that will give me more of the blue/aqua tone as opposed to the grey?

(alt+p)