Cloud Nine vs Mountain Air
Cloud Nine and Mountain Air come from the same Sherwin-Williams collection. Cloud Nine reads as white, while Mountain Air reads as blue-grey — two distinct hue families, not close cousins. The 5-point LRV gap — 78 for Cloud Nine vs 73 for Mountain Air — means Cloud Nine will open up a space more effectively. Where Cloud Nine leans neutral, Mountain Air reads cool — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 4.2 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cloud Nine vs Mountain Air in Real Spaces
1 real room side by side. Cloud Nine and Mountain Air are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Dining Room
Dining rooms often rely on warm incandescent or candlelight, which flatters warm undertones and mutes cool ones. The brightness difference is modest but present — Cloud Nine gives the walls a little more lift.
Color Details
Cloud Nine vs Mountain Air Simulated Comparison
5 simulated room previews — drag the slider on each to see Cloud Nine on one side and Mountain Air on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Cloud Nine comparisons
See how Cloud Nine stacks up against other well-photographed colors across different brands and tones.
Cloud Nine reads slightly lighter (LRV 78 vs 69), a gap that shows most in low-lit rooms.
A 5-point LRV gap (83 vs 78) makes White Dove the marginally brighter of the two.
At LRV 78 vs 6, Cloud Nine is decisively the brighter choice.
Cloud Nine reflects far more light (LRV 78 vs 52), opening up a space where Purbeck Stone encloses it.
Cloud Nine reflects far more light (LRV 78 vs 30), opening up a space where Evergreen Fog encloses it.
At LRV 78 vs 52, Cloud Nine is decisively the brighter choice.
Cloud Nine reflects far more light (LRV 78 vs 60), opening up a space where Agreeable Gray encloses it.
At LRV 78 vs 58, Cloud Nine is decisively the brighter choice.
At LRV 78 vs 27, Cloud Nine is decisively the brighter choice.
Cloud Nine reflects far more light (LRV 78 vs 43), opening up a space where French Gray encloses it.
Cloud Nine reflects far more light (LRV 78 vs 4), opening up a space where Naval encloses it.
At LRV 78 vs 55, Cloud Nine is decisively the brighter choice.
At LRV 78 vs 13, Cloud Nine is decisively the brighter choice.
At LRV 78 vs 44, Cloud Nine is decisively the brighter choice.
Pure White reads slightly lighter (LRV 84 vs 78), a gap that shows most in low-lit rooms.
Cloud Nine reflects far more light (LRV 78 vs 21), opening up a space where Artichoke encloses it.
At LRV 78 vs 66, Cloud Nine is decisively the brighter choice.
A 4-point LRV gap (78 vs 74) makes Cloud Nine the marginally brighter of the two.
A 5-point LRV gap (83 vs 78) makes Snowbound the marginally brighter of the two.
Cloud Nine reflects far more light (LRV 78 vs 51), opening up a space where Pigeon encloses it.
At LRV 78 vs 12, Cloud Nine is decisively the brighter choice.
At LRV 78 vs 8, Cloud Nine is decisively the brighter choice.
A 10-point LRV gap (78 vs 68) makes Cloud Nine the marginally brighter of the two.
Cloud Nine reflects far more light (LRV 78 vs 41), opening up a space where Dix Blue encloses it.
At LRV 78 vs 12, Cloud Nine is decisively the brighter choice.
At LRV 78 vs 45, Cloud Nine is decisively the brighter choice.
Cloud Nine reflects far more light (LRV 78 vs 31), opening up a space where Pale Green encloses it.