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.

Thanks everyone for their comments! Update: husband has 'over-ruled' on this one. Forgot to mention that the vanity top will be Night Sky Ceaserstone (ie black). So he wants the dark grout. We will definitely be using mould inhibitor and ensuring everything is well sealed. It's all his fault if it looks horrible ;) Will post photos once fully complete. (I am now a little scared...)

I have white floor tiles. We used the plain, concrete grey. Best thing ever. Easy to keep clean and break up the plain look. Good luck !

You can’t go wrong with white. I always suggest match to the wall colour or the trim colour.