Colour backsplash w/ dark kitchen. If you do want to change the island countertop, it could also immensely lighten up the look.
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Similar to previous photo, except main counters are light and island is dark.
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Light backsplash does significantly lighten up this dark wood kitchen with dark counters.
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Light countertops (which I know you aren't thrilled about changing) and light backsplash can make a big change.
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Again, this feels lighter because of the white counters, but they also were able to bring in some colour.
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Backsplash is not the exact type of chevron, but subway tiles placed like the chevron ones you liked, just so you get an idea.
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Chevron backsplash. This kitchen is much lighter, but they do have some dark cabinetry. If you do decide to do your kitchen, we could discuss even painting some of your cabinets (uppers or island, etc)
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This doesn't have a proper backsplash, but at least it gives the idea of a lighter space between dark cabinetry and medium coloured countertops.
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Again, this has both light countertops and backsplash, which give a more contrasted look.
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If you can ignore the green factor, both countertops and cabinetry are quite dark, but the white backsplash makes it feel much brighter.
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Backsplash makes kitchen feel much lighter.
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An example of a lighter but bit different backsplash in a dark coloured kitchen
Colour backsplash w/ dark kitchen. If you do want to change the island countertop, it could also immensely lighten up the look.
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