It is hard to advise based on just a general description of paint colors but here is a tip ...

Paint small ply wood boards (1ft x 1ft), or painter's canvass boards all the colors you are considering. Prop them up against the most visible wall and observe them over a couple days (or a week) in various lights -- interior lights only, some sunlight, full sunlight, etc.

Your favorite color or tone will stand right out!

Sorry, I only used the Sherwin Williams paint names bc I know a lot of people on this forum are familiar w/ them.
Thanks for the advice though. I've already painted small patches directly onto my basement wall. I keep looking at them at different times during the day but I still am not completely sure yet.

I'm also trying to pick a basement color. I have sampled macadamia, softer tan, blonde, believeable buff and more. Those colors all look blah and kinda muddy in the basement, except for blonde which is way too yellow. I think we're going to go with Austere Gray. It's a beautiful shade and really brightens up the basement.

I have blonde in my family room, but it gets plenty of light so it doesn't look very yellow there. And I have believable buff throughout my foyer & hallways as my neutral shade. It looks really nice w/ quietude (a blue shade) in my living & dining.
I'm leaning toward nomadic desert for the basement. But hubby likes macadamia, which I think has too much green undertone. That killim beige color is apparently really popular, but it seems blah to me like soft tan.

I am also considering nomadic desert for the basement. we will either go with that or austere gray.

I have nomadic desert in my formal areas and love it. For the less formal areas i used a custom mixture of kilim beige and nomadic desert. Its great but my room has a lot of light. This is the custom color

Heres the nomadic desert. I think its a great color.