Lighting is very important in any basement. Having dimmable lights enables one to change the setting for any event. Heres a video of our basement. We’ve used both light and bold colors to define areas within a space. Just foof for thought before you commit to a single warm color. https://youtu.be/KAUak7Xneh0

Try Romabio. It's lime-based and has an old-world look or Farrow & Ball in their estate emulsion -- lowest sheen possible and it's clay based for that plaster look.

For paint to exhibit an accurate color, light is essential. I only see the one fixture near the top of what must be a 14-16 step flight. Try placing a table lamp midway and/or neat the bottom. Also, perhaps give daylight bulbs a try. See if that corrects the issue and if it does add lights. We have a 14 step run with a 180 degree turn at a landing midway. Ours has a wall fixture near the top and canisters at the landing and bottom. Walls and ceiling are a medium gray.

I chose a grey color for my master bedroom based on wanting something that was neutral enough to not clash or highlight my orange toned wood trim, and also match with a lot of other wood finishes. I used Sherwin Williams "Grey Screen" which ended up reading a tad blue, particularly when other blue accents are in the room. I like it though, it is neutral enough to make a great background wall color for all kinds of wood furniture in there, bedding and art. https://www.sherwin-williams.com/homeowners/color/find-and-explore-colors/paint-colors-by-family/SW7071-gray-screen