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.

Hi, What sort of look are you after? And what colour is the worktop? I'm not a big fan of tiles in the kitchen ever since we installed a splashback which is ever so easy to clean and you have no worry about grout lines. I'd consider a neutral coloured splashback, maybe a greige? or a antique, distressed effect mirror splashback to bounce light.

Is there any reason why you're not having the same quartz for the up stand as you are having on the worktop? That would be most people's choice. I do like the tiles however, and think they would go very nicely with what you describe.

Are you saying the glass splashback is the wrong size because it doesn’t go all the way up to the extractor fan? If so I’d guess that they’ve installed a standard size as opposed to a purpose made size. If so l would just take that one down and get a taller one made. You could always have the splashback all the way across the wall. l don’t think it needs tiles too. You could add a tint of colour with the emulsion,