Such a pity... your splashback is beautiful, but it looks out of place at the moment. There are a couple of things you could do: - cover the rest of the wall in a back-painted glass that matches the background colour (milky white?) of your splashback (similar to pic below) - you could have it on the left hand side wall (the one with microwave+oven) if you can give up the plugs there, re-sized, obviously; choose something else for the rest of the kitchen. - re-size and place it vertically in front of the hob. - use it somewhere else (bathroom?) and consider new splashback for kitchen. Good luck!

Tiles are one way to introduce some pops of colour in your kitchen. If you are worried about the grout discolouring, use epoxy grout which is more resilient to liquid staining. Also, if you use a coloured grout, discolouration will be less noticeable. If you choose textured tiles with rectilinear edges, grout lines are almost invisible. Using tiles can look more traditional compared to glass or stainless steel. The problem with stainless steel is keeping it looking good. Drip marks and grease are instantly noticeable. Glass is less obvious when splashed. They are both more industrial and modern looking. What about using the same material that makes up your worktop as the splashback? Most manufacturers of manmade worktops also do an 11mm thick splashback and upstand.

I think maybe the opposite, that an ordinary mirror would look out of place in a kitchen. Certainly it may show a lot of splashes up and you'd be forever cleaning it. The smoked mirrors sound nice and will work well with both colours that you've chosen.

Copper and graphite work well together. Perhaps look at something along the lines of Calacatta Marble. Here’s a small kitchen we did. Graphite on the bottom with copper handles and Dove Grey on the top, Calacatta Marble worktops