You already chose a white for your cabinets then? Feel free to choose the same white for your walls. There is no paint color called French Oak Grey that I can find.

We built in 2021 and I have a north facing kitchen in FL with a large triple window (5 ft tall x 10 ft wide). I brought in all the popular white samples to pick a cabinet color and the only one that didn't turn dingy in my light was BM Chantilly Lace. I then used that same white for all my trim, doors, crown. Most of my upholstery and art leans warm, so BM Chantilly Lace would be too white for all my wall. I went with BM White Dove for the walls.

If you want one color for everything, you might want to look at SW Pure White or BM Simply White.

Walls and cabinets same white.