You can see it a bit better in this photo.

Here is a link that might be useful: Fireplace

I think it looks like you did a very nice job with your tile work, and the colors and patterns look good with the other things you've chosen.

If what is bothering you is the amount of tile, or the lightness of the tile in comparison to the darkness of the fireplace unit... then I think that a good answer might be a piece of art hung over the fireplace that has a rich, heavy wood frame. The piece would break up the tile, while allowing your accent rows to show, and would bring some of the warm wood tones you have elsewhere in the basement to the fireplace wall. I would aim for a more horizontal piece than normal, with a width about the same as the FP, but a height that wouldn't block the tile accents.

That said, you really don't need to do anything. You did a very fine job with your project.

Thanks for your input chalifax. You are correct the lightness of the tile is what's bothering me. I was thinking of putting something there. I'll just have to scout around for a good piece.