I think that would look beautiful. There are many kitchens if you search houzz with white cabinets and copper accents. You will probably want to try to choose your backsplash and counter together so you can hold the tile against the granite to make sure they are complementary. Depending on how busy you want your backsplash, do a more uniform granite or a more solid looking quartz or vice versa if you want the granite to be the star.

The best thing you can do is to search Houzz photos - just insert features you want into the search box - and get some ideas from there to start with

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