Show all four sides, flooring, and furnishings or detailed descriptions of furnishings. Paint has to relate to everything. The usual advice is to pull the lightest color from stone, go even lighter. But since you haven't provided enough visual information, it's had to give advice.

Here is how to post a Design Dilemma to get the best results. You need to show the whole space—all four sides of an entire space—even if it’s about one specific Dilemma. Commenters need to see doorways, windows, closets, finishes throughtout the space to make informed suggestions.

State right at the beginning what the room will be used for and who will use it. State the non-negotiables at the beginning, what has to be kept. Give some idea of the budget. And provide approximate measurements

https://www.houzz.com/discussions/6417709/unofficial-design-dilemma-boot-camp

Keep in mind that you're inviting some design pros and people with a design eye into your home via photos. If they walked into your actual space, they would take in all of it: all four sides, doorways, floors, windows, ceiling, built-in fixtures, lighting, trim--the "givens"--then the features that can be changed--furnishings, paint, art, rugs, decor items, etc. It's all one first impression. Same thing with photos. That's why it's important to provide well lit photos of the entire space, taken from all sides of a room regardless of the size of your problem.

The wall colour should also coordinate not only with the fireplace but the furniture in the room which we cannot see. Please post pictures of the entire room showing all walls.

I would sample SW Alabaster, no color, but would compliment the stone shades.

walls and ceiling. Will you be changing anything else? Just repainting?

What color in the room do you hope to highlight?

Sage greens always work with wood trim, but if you don't want the sage green then you need to pick another color that works with the wood trim and the fireplace and the flooring.

I am not big on Sage Greens as my neutrals, so I would probably be looking for a creamy white or off white that I liked with the stone and the flooring/trim.

Might start with SW Creamy, might also look at BM Swiss Coffee.

I wouldn't want to go too gray because I like creams better than gray and especially with warm wood tones that may look to orange against a gray.

Another option is to go with a greige that is a gray beige with a bit of green undertone. Neutural color not green. - test BM Revere Pewter

Using those two you may get some idea where your preferences lie. Which tone you like (Creamy vs greige) and how light you want the paint (Creamy is lighter than Revere Pewter).

Look at the colors next to the flooring, next to the fireplace and next to the window trim.

Between BM and SW there are about 6000 colors to pick from - overwhelming. I generally limit my first pass to the colors that are listed as best selling / faovite neutrals and whites

https://www.sherwin-williams.com/en-us/color/color-collections/top-50-colors

https://www.benjaminmoore.com/en-us/color-overview/color-palettes/most-popular-colors

It will get you close, then we can help pick similar colors or if you like something, but want something a little lighter or darker or less yellow or more yellow we can help get you closer to your ideal, but there is a reason they are the top sellers. They work in a lot of homes.