1)Farrow & Ball, 2) Dulux ,

Agree with Colourhappy you must take into consideration flooring and aspect of room also I think that Dimity is just too pale perhaps. I would go alot deeper and suggest London Stone. You can use it with off white for skirting etc. However it will be "dark"! - you can add rug that is light coloured (cream). I attach a pic so you can see what I mean by "dark" but it is very nice i think. Oxford Stone might be a good compromise. I think you are on the right track as this set of colours has red/brown undertone.

I think the lighting is out on this photo, it's sage grey which you can see on the other photos on the link. try looking for a wedgewood blue, zoffany do one or try little greene bone China blue or farrow and ball Parma gray. They're not identical but similar shade to what you're looking for. What's going on the floor and worktop And people may be able to help more with tile suggestions https://www.spillerskitchens.co.uk/kitchens-projects/mackintosh-painted-shaker-with-5-oven-electric-aga/

Hi! I would use a Color Muse to measure the colour attributes of your flagged floor and then choose a colour, which relates to the hue family to which the flooring belongs. Then all you need decide, is whether you prefer the wall colour to be darker or lighter, but knowing that it will coordinate with the flagged floor.