Sheen dulls out over time so a shiny paint will never match in sheen exactly right away. Also, matching the texture is important. You don't want to use a paintbrush over a surface that was rolled. Sometimes, it's just not possible for the paint to match exactly though after some time has passed, especially with washable paint, and touching up in areas where there is light coming in from windows is shining down the wall is almost impossible.

All the walls are supposed to be painted not an accent wall. How far up to the ceiling is the question. Thank you

Your choice of white walI and cabinets is just perfect with your other choices, very clean and fresh. I think the walls and cabinets can be the same color white, but the cabinets should be a different sheen. This is not only for interest's sake, but because cabinets get handled a lot, and in a kitchen with potentially food-covered hands, and a semi-gloss can be easily wiped clean. You can even use high gloss, but the surfaces need to be in perfect condition, or the imperfections will be highlighted. For the walls you can use eggshell or satin (satin has a little more sheen than eggshell) and I would use the semi-gloss on any trim in the room such as window and door casings, moldings, etc. You can use matte on the ceiling, or if you don't want to bother with the third type of paint if you won't be using this color anywhere else, just use the eggshell or satin on the ceiling as well, your kitchen will be nice and bright. If your kitchen doesn't get much natural light or faces north or east I would paint the ceiling the eggshell or satin so that the light in the kitchen bounces around.

I echo the suggestion about sample boards, that is very important! You could pull one of the grays from the stone for your island - I see a dark gray, a medium warm gray, and a blue-ish gray (if my computer is rendering the colors accurately). Again, sample and make sure that the gray tone works with your cabinet choice (that blue might be an alternative to white for the cabinets also). With warm white cabinets, you could find a warm blue or green for your walls, if you want to introduce a touch of color. I like pale tones, to offset the strength of the granite.