I would personally stick to white cabinets... I know, not very original... but I think white works best with timber benchtops... and black/white/timber is a fail-proof/timesless combo imo... But if you wanted to inject a bit of colour... and based on your coastal theme description... then I would suggest maybe duck egg blue?... do a search of "duck egg blue kitchen" in photos on Houzz AU

You could try the antique white USA in 1/2 or 1/4 strength against the stone to see if this tones down the 'creamy' enough without contrasting too much with the walls

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.

I think non gloss given that the bottom cabinets look as if they have some shine. Just looking at the photo again, do they have any damage? If so it might be a good idea to replace the doors on these at the same time - if that happens you can even more options on colour scheme. Good luck I am sure either way you will love the refresh and extra storage.