No to the grey - your wall seems to have a green tinge in them, so I would say either green/grey or a warm white tile with darker grout. If you choose the right grey/green, it is a classic look so shouldn't date. If you are a bit scared to choose colours, why don't you get a couple of warm white sample tiles and put where the splash back will go. You will soon see if it looks too stark....(maybe another idea, but possibly not a good one - why don't you see if you can put a few pages from a blank sketchbook in the whole area where the splash back will go (not super white white, but a warm white). That could also possibly highlight how stark (or not), the white may look. I can see what design tank is saying, as your cupboards appear to be more cream than white in the photos and if this is the case, then I agree the white will most likely look too stark. My cupboards in kitchen were white (but a warm white not a cool white). The stone bench tops also have the little speckles of stone in them..I can't remember the colour Ocean foam/Osprey.......but even with those colours and them not being cool whites, I thought the white tiles looked too stark against them. I therefore went for a glass splash back and ever since I then went to think of designs for my bathroom renovation, I constantly regret going with the glass in the kitchen and modernising the house too much..........definitely don't do glass if you are wanting to keep a classic charm to the house. In a long winded way, I think yes, I also think you should just stick with the grey/green. It will make a statement. Not the right shade...but another example....it may be hard getting the colour of the tile exactly right given that the walls are already painted and the tiles need to match.

You can always go with textured glass or slump glass,it has a more rustic look and doesn't look so modern as plain glass, it's much easier to keep clean too as it doesn't streak and there is no grout...we have a very traditional kitchen and it looks amazing,this is my laundry and is actually quite a vibrant purple with dragonflies on it because,in the laundry,why not? The kitchen is more nuetral......

As everyone has said it looks good but sometimes you just need to update and change. There is products available, Kerlite porcelain cladding for one. Kerlite is a thin porcelain cladding that comes in many colours and textures. Can be used on walls floors bathrooms, outside etc. I had a small court yard with a door leading to the garage. I covered the door and the rendered wall to make it all flush and create a feature wall. Basically there is nothing you can’t cover and the colour and texture range now is unbelievable. Kerlite is definitely not a diy job, you need the experienced tiler. Also it’s been out for a while now and I’m pretty sure there is tile cladding etc etc. maybe google porcelain cladding, there will be similar products. Check it out I highly recommend it.

It may be a matter of Style, If you are using Shaker Doors and your kitchen is more in the traditional Federation (Hampton) style then Subway tiles will work well. On the other hand if you are using the Shaker with a more modern feel in a Transitional Style then yes Glass or Smoked Mirror will work (as well as provide you with a smart looking, easy to clean splashback. Hope this helps, Malcolm