If your room is nothing but neutrals except for your colored ceiling, then you very well may be adhering to the 80/20 rule. And if well-executed, this strategy for color could add great interest to the room. But we know it's not for everyone, so tell us, Color Curists...
Maybe a colorful hue like in this Inspiring Studio?
Or a moody bedroom's dark ceiling is more your style?
Perhaps you love the organic feel of Mary Roach's Nest?
The Color Cure, Week 3: The 80/20 Rule
Week 3 Video: The 80/20 Rule
Color Tip: Accent Your Entertainment Space with Colorful Dining Chairs
Color Prescription: What Color Would You Choose?
Before & After: Finishing Touches in an 80/20 Living Room
(Images: Celeste Sunderland, as linked)