I pondered this light gray tile for our backsplash - the sample I received was very pretty. We ended up going with a light green glass tile but I did really like the gray.

https://tilebar.com/lancaster-3x6-dove-polished-ceramic-tile.html

Could it be this one from tile bar? Nabi Tundra 3x6 Ceramic Tile $14.95/sq ft.

Looks very similar. And I love the crackle finish on it to add some interest.

Have a look at Tilebar.com otherwise and see if anything jumps out at you.

There is this one Dove, which appears to be a very light grey colour.

Or Lunadabaytile.com, might have something that would work for you. There is grey glass tile to consider as well, frosted or glossy.

I just installed a glass tile. AKDO is the manufacturer. Color was Artic white. Hint of light grey which is what I wanted. It was sold in sheets and laid in a block style. My installer cut the sheets for me and laid them in a staggered (subway like) style but be weary with glass. Mine looks a little darker/bluish now that it's up. I didn't like the ceramics I saw, but the good thing about ceramic is it will look exactly the same when its up. Many variables with glass. Good luck!

The gray tiles in your picture may be from Wayfair.

here are some others:

https://www.homedepot.com/p/Daltile-Finesse-Cool-Gray-3-in-x-6-in-Ceramic-Wall-Tile-12-50-sq-ft-Case-FE0636HD1P/207206315

https://www.homedepot.com/p/Merola-Tile-Park-Slope-Subway-Glossy-Warm-Grey-3-in-x-6-in-Ceramic-Wall-Tile-17-sq-ft-case-WXR3PSWG/207148942

https://www.homedepot.com/p/Merola-Tile-Metro-Soho-Subway-Matte-Light-Grey-1-3-4-in-x-7-3-4-in-Porcelain-Floor-and-Wall-Tile-1-sq-ft-pack-FMTSHML/300834758

And these are a 3x12 (which is a nice size if you have a larger than average backsplash area) made by Emser Tile-Craft

You're better off going to a good tile showroom instead of looking at countless photos online. It's harder to gauge color on a monitor; in a showroom you can walk out with a dozen samples and check them at home in your lighting against your counter tops.

There is no way to choose a specific color of gray online so go shopping to a decent tile store , bring samples home to make sure in your space the color still works. Have you looked at gray glass subway tile.

I found this, looks pretty nice:

https://www.homedepot.com/p/Jeffrey-Court-3-in-x-6-in-Weather-Grey-Ceramic-Wall-Tile-12-5-sq-ft-Case-96496/302772680