A couple of points to add with regard to the functionality side of things: Grey tiles, means grey grout which will be infinitely easier to maintain, every home that has cream or white floor tiles will ultimately end up with dirty grout lines, no matter how well you look after the floor. Grey tiles also hide dirt/hair etc better than light coloured tiles. From a design perspective, as long as you choose a tile that is quite simple and elegant, grey is almost always in style. Matching things to this colour palette is not so difficult, maybe stay away from microfiber chocolate couches though!

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 wouldn't go those dark laminate kitchen cupboards. I have the exact same and I absolutely loathe them now. I use to love the darker colours but now I wish I had just done them white, light gray or even the dark blue (although dark blue worries me a little too!). That dark laminate brown is such an absolute pain to keep clean. They show up every mark. I like your stone bench tops though but would look at other options to create the look you're hoping for with the joins and waterfall benches etc. Goodluck with it all!

Thanks for your insight, yes I'd looked at Surfmist as well, clients seem quite pro grey so trying to subtly work their likes into the scheme as well, as I think they woule like a grey house however I think the monochrome black / white is classic and will endure the test of time longer than some shades of grey, also if they were opting for white windows may be more inclined to look at grey for the house colour however feel that the black windows will work nicer with the lexicon and tie in the black elements. Welcome all feedback