Do you intend to change the hearth or just the surround? It would help to see more pictures of the space and your other furniture. The cool tones of the hearth and the warm tones of the floor seem at odds, but there may be more going on to tie them together.
Your geometric selection actually looks like it would go with both. But it is pretty busy.

Where wuld you put tile on that FP You will need to remove the whole surround then tile can happen . No way in any braind do those MCM tile work anywhere in the space I see. You need to explain what you are doing. Post that info here in a comment DO NOT start another post.

Are you keeping the elaborate wood mantel ensemble? Because that would rule out "wood-look" anything, and would argue for something very simple. You might want to stain it too.

the mantle needs stain or paint. that yellow wood tone doesn't work w/the hearth.

where / what are you going to tile?

what's the overall style of the house/ room ?

that fireplace is very traditional and higher end look to it. (once it's stained) if keeping the hearth I'd do a darker walnut w/just a touch of weathered gray to it.

if you want to paint it, you could opt for something in a room that looks like this

Or some of these (In fact, this 2nd pic could be your room(

This is a beach cottage with an old fashioned vibe.

Everything is new, nothing is being replaced. The old mantle is reclaimed and already finished, staying that color. The hearth is a blue quartzite, which is the same as the countertops at the other end of the room. Its height and width are code. The walls are Valspar's "fuzzy slippers," a super pale blue toned white, that shows more blue in person. Unfortunately, I'm six hours from build and cannot take pictures of other furniture, but there are two dark, navy leather sofas that have a tone similar to blues in chair. I have not chosen a rug, side tables or a coffee table yet. Waiting till the other things are chosen and I've lived there a while. (The wood piece along wall will not stay in that room.) Patricia, I know you are not a fan of great rooms attached to kitchens, but that is what I have.

The black surround is the unfinished metal part of the prefab wood burning fireplace. Tile will be installed on top of firerated board that will attach under sides of mantle, to cover the metal to eventual black glass doors, since grout doesn't adhere well to hot metal. Perhaps the whole thing should have been the quartzite, but that ship has sailed, so...tile.

This is not my dining set, but very close, but some of my chairs are wood toned, and some are navy, not black.

Since this seems to be an antique mantel, or at least it looks like one, I would tend to stay in the same colour as the mantle. I haven't seen your carved wood look tile in person so don't know if it's too busy or not but it seems to be in the right colour range. I also found a Travertine tile at the Tile Shop that also seems to be in the right colour range. It's too bad the mantel is up on an hearth, would have been better on the floor but you work with what you have and cannot change.

If the surround stays then everything around should be secondary in importance. Simple and minimal. I would have marble or granite installed around the firebox and replace the riser. Black, blue, green, gray, any color that works with the room, but NO TILE.

i think the stone on the fireplace is fine.

the wood mantle is too yellow. (It actually looks like someone recently stripped it. has somewhat of an unfinished look to it) stain it or paint it

I'd refinish it. give it a fine sanding, brush away dust, wipe on a weathered gray/light walnut stain color

You could take the color down a notch as Beth says. Maybe a little Modern Masters bronze paint on the surround?

Oh, Paul, I love what you've done with the place! (Funny, I have that throw on the sofa.) I have toyed with just painting the metal. The black must go, but wasn't sure how it would look painted in the long run. Your mock up helps a lot.. And yes, I hate to admit how dang big that TV is. It gives me vertigo and sort of defeats the idea of bothering with any design efforts in the rest of the room. I keep telling myself, I get the beach, Dh gets his monstrosity. (I am not married to a guy who says, whatever you want, dear--thus the leather sofas, too.)

Thank you, everyone for the advice.

The hearth is actually Ijen Quartzite, which for whatever reason photographs true grey. It has much more blue and white (even beige) veining that really pops in sunlight, which that room gets plenty of. It cannot be any lower, due to codes.

The mantle does not really read yellow in person. I looked for a picture I might have that is more accurate, which is more of creamy, nearly pinkish beige. I did, as some of you suggested, intend to paint it white, but once it was in the space, it looked so good with the floors, it's staying that way, though the darker tint is an idea.

And a version of the DH sofas. (Mine have blondish feet, so I tried changing them in photo.)

I don't think a lot of men are keeping up with just how good and cheap ultra short throw laser projectors are, even during daylight. 85" is nothing compared to 120" projection. You can pick them up and use them outside on warm nights. Keep working on him!

Costco sells 4 of them now.