Have you been to visit some kitchen showrooms? You can customise the photo search here on Houzz quite a bit. For example, you can simply select [dark wood[(https://www.houzz.com.au/photos/kitchen-design-ideas-with-dark-wood-cabinets-phbr1-bp~t_10444~a_17-103) cabinet finish in the filter options. Then add more filters like floor colour, kitchen layout, cabinet style, wall colour etc if you wish. Leave the benchtop and splashback options open and see what results you get. You can then save any photos that appeal to your ideabook.

I agree the above suggestions are perfect for this very modern and edgy duplex. Does the artist's rendition reflect the colours and/or materials you plan to use on the exterior: black, white, grey (brick or concrete) and timber? If so, some continuity of colour and material (timber) for your interior will keep it a cohesive and beautiful. You mentioned polished concrete floors. May I ask what colour they will be, if they will have aggregate or not? Which timber do you plan to use as cladding for eaves and front decking/porch? I ask because you may wish to use the same in parts of your interior. i agree white is good interior wall colour. I really like the idea of white cabinetry in kitchen with a dark base cabinet in island bench (if you plan to have one). There are good photos in Houzz to show how this looks. what material do you want for benchtops and vanities? your project is very interesting, Wilson!

You could have one side of galley kitchen cabinets in a richer shade of white (I'll have to start looking at the choices) and the opposite side in a grey. Will you have overheads too? Then the subway tiles in a softer shade of grey than the grey lower cabinets. I'd love to see photo of door handles.

Dulux whisper white. Get a sample pot, paint a large piece of cardboard and see for yourself.