Gray goes well with cream

With the roof tile colour I suggested off white, but NEVER WHITE as you'd need sunglasses to enter (talk to a roof painting company). It's also a way to minimize heat by reflection, therefore lowering cooling cost and making life more comfortable, plus very aesthetically appealing. Though the down side is more regular semi pressure cleaning. I do like mid to light grey for outside timber decking or tiles under a roof line with this colour combination. For anything else as far as outside in direct sunshine, stay light but in the same hues, it can be too hot to walk on barefooted if remotely mid to dark in colour.

I would suggest replacing the counter tops with a stone not overlapping too much for a modern look. Neutral white or light grey tones or if you want to go overboard a gorgeous Carerra marble. Keep your cabinets white too, white kitchens are great for re-sale, easy to live with and you can bring in colour with accent pieces such as a decorative bowl on the kitchen island and some coloured appliances. I would personally paint the window white. With a white kitchen you can virtually paint your walls whatever colour you want. I think a pale grey/blue would be lovely for a Hamptons feel which would suit the style of your kitchen but remember if you paint the architrave around your window white then you may have to follow through to the adjacent room. You could also replace the hardware on the cabinets, black knobs and D handles on the drawers would be nice, I used black in my beach house kitchen. See the image below. The blue on the ceiling of this kitchen below is a lovely colour, if you definitely want blue I would choose a blue/grey. Make sure it doesn't throw any mauve as blue's can do this, use a test pot first and ask them if it has a lot of red in the base as you don't want this. I can't advise a paint colour unless you live in New Zealand as I am not familiar with US paint colours. Remember the colour you paint the kitchen walls will also depend on the colour in the adjoining room, you should try to choose something that will work with your adjoining spaces. Putting two new suspension lights over one of your islands would also give a new look to the kitchen. I don't know what the rest of your house is like with regards to style so can't make a suggestion but your kitchen definitely could be Hamptons style by the look of the cabinets. I just noticed that you have stained wood architrave around the other adjoining room so if you paint the kitchen window you may have to do the entrance to the other room etc. White will make the spaces feel bigger, they won't seem broken up by the wood colour. Good luck, would love to see your finished project.

My fav is Dulux natural white but a lot depends on your house location. Pick a white, do a large sample board, try it in various places outside. Then decide if you want to go lighter or darker. You need a reference point to start with.