What is the problem?

Please post a picture of the kitchen and the sun room. I love that gray floor.

The second photo is my tile fireplace ... trying to decide if grey owl would work ... no tan color ... that’s what we have.

The fireplace is in the same room as the slate? that's kind of burying the lede...

Check out my post on how I shined up my slate floor with ZEP sealant and floor polisher!

I think the space does not have to be the same color as the kitchen but as mentioned I can’t see the isse with gray owl it is probably in that slate somehwere I would probably do the walls in a color like the FP tile only lighter.

I think gray owl will work fine if you really want them the same color. Its hard to tell the layout and how close the rooms are together. A picture of the entire space would help a lot. If you are looking for another color, then I agree the color of the fireplace would look nice.