Hi Jo. The light will differ in each room so would go for different shades according to the light in each room. Maybe also consider darker accent ŵalls for alcoves and in the dining room? You could even do the woodwork and coving a shade or 2 darker than the walls. I'd go for a soft chalky white on the ceiling. Have a look at farrow and ball for matching colours or little Greenes shades come in light, mid and dark

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I would have poo poo’d this idea before as I’d wonder what the point was, but make your self a mood board using the colours roughly in the same ratios. Are you planning on having some artwork as this may be the lynchpin that helps it hang all together. Pulling colours through from that will help the scheme. Tonal can be soft and soothing but needs layering up with texture to create a cohesive scheme. Alternatively pops of bright colour can look amazing and your kitchen is lovely and bright with good bones. What is the rest of your house like, and what is your style?

I agree with the others - go for it! It’s going to look fab! I like the dull greens more than the more foresty greens, I had a bathroom painted that colour many years ago, and I think it’s less likely to go out of fashion. It’s verging on being a dark neutral.