Have you looked at what they pair it with online?

Yes, I did notice their pairings, but I was hoping for one general color that might serve all 3 rooms. Perhaps that’s unrealistic. Or impossible.

No, i think it is doable. Can you decide after the walls are painted? Once it is painted, you could try swatches of natural linen and icicle and nice white... and colors adjacent on the same strips.

Go with flat Alabaster for ceiling and satin/semi gloss for trim and you would be fine. Sample it first.

Thanks for the suggestions. I think (I hope) that was my last major decision on my project and fatigue is setting in.

All of the trim in my house is SW-1095 a/k/a Off White. And with this last round of painting, most of the walls are SW Natural Choice. It is an off-white that leans to the gray-green side.