https://laurelberninteriors.com/2015/06/07/the-one-white-trim-color-that-works-every-time/
We went with Laurel Bern's advice to use BM Cotton Balls for all our ceilings, trim, and interior doors, and it looks lovely; the ceilings are in Regal Select ulti-matte finish, and the doors/trim in Regal Select semi-gloss.
We live in rural Alberta, so have lots of natural light in the summer and limited amounts (usually reflecting off snow) in the winter; we have north, south, east, and west exposures. Cotton Balls works well with the yellow walls (BM Casablanca) we have throughout most of the house, but also with the BM Revere Pewter and BM Natural Wicker in several rooms.
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see note re natural rug web site
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