Just to offer a different view point. Your floor tiles look amazing. Why not flow the idea through and use tiles of that ilk as your splashblack. We have just recently finished a kitchen with a similar feel and our client opted for patterned wall tiles as their splashback. Based on your comment about the floor being chosen to banish boredom If you are worried about carrying through more of the same tones and want to inject colour, you could always do this through your accessories, that way if you fancy a change.... The colour tones you have chosen provide a great canvas on which to complement or have fun with colour.

Depend on your water quality if it generate mildew often then avoid glass If you use tile avoid bright color grout cause it Will get yellowish or black after sometimes, bigger tile are better because less grout lines to clean Theres Wood called hinoki used in many Japanese onsen, it ressistant to rot, water, insect and has natural antibacterial property plus if in contact with hot water or steam it gives of therapeutic Woody smell https://share.google/Odjcre9a9hXgCmFPO

Yes, you're correct, if you have your splashback up against the extractor then you'll trap the back of the hood facia, which you need to be removable for access to the grease and carbon [if fitted] filters. TBH the worktop guys would just template up to the extractor, they're not kitchen fitters and they're doing what they've been asked to do. Not having an extractor where you previously had an extractor, as a rule of thumb, shouldn't be done under part F of regs, for good design practice you don't make the extraction worse and if Howdens have designed and supplied this then its not suitable. If you've outsourced the quartz could be a bit different though. Howdens do have deeper wall units at 390mm.

Hi Helen, To tie the scheme together and reflect the beautiful garden I highly recommend a green/teal tone. This uses colour theory as green and blue are next to each other on the colour wheel and teamed with a neural look very impact 🟢🔵 + ⚪. Drop me message and happy to recommend tile products that's I've used for splash back before. Alicia, Adesignstorie