Thundercloud Gray vs Tranquil Dawn
Thundercloud Gray is a Benjamin Moore color while Tranquil Dawn comes from Dulux. Thundercloud Gray reads as blue-grey, while Tranquil Dawn reads as green-grey — two distinct hue families, not close cousins. At LRV 55 vs 50, Tranquil Dawn will read as the brighter of the two — a 5-point gap that matters most in north-facing or low-light rooms. The tonal difference — Thundercloud Gray's blue character against Tranquil Dawn's neutral — becomes most visible against white trim or in morning light. At ΔE 7.2, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Thundercloud Gray vs Tranquil Dawn in Real Spaces
2 real rooms side by side. Thundercloud Gray and Tranquil Dawn 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.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The brightness difference is modest but present — Tranquil Dawn gives the walls a little more lift.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The brightness difference is modest but present — Tranquil Dawn gives the walls a little more lift.
Color Details
Thundercloud Gray vs Tranquil Dawn Simulated Comparison
5 simulated room previews — drag the slider on each to see Thundercloud Gray on one side and Tranquil Dawn 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 Thundercloud Gray comparisons
See how Thundercloud Gray stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 50), opening up a space where Thundercloud Gray encloses it.
At LRV 69 vs 50, Ammonite is decisively the brighter choice.
Thundercloud Gray reflects far more light (LRV 50 vs 6), opening up a space where Iron Ore encloses it.
Their light reflectance is nearly identical (LRV 52 vs 50), so neither reads brighter in a room.
At LRV 50 vs 30, Thundercloud Gray is decisively the brighter choice.
With LRVs of 52 and 50, the two reflect almost the same amount of light.
A 10-point LRV gap (60 vs 50) makes Agreeable Gray the marginally brighter of the two.
Accessible Beige reads slightly lighter (LRV 58 vs 50), a gap that shows most in low-lit rooms.
Thundercloud Gray reflects far more light (LRV 50 vs 27), opening up a space where Denim Drift encloses it.
A 7-point LRV gap (50 vs 43) makes Thundercloud Gray the marginally brighter of the two.
At LRV 50 vs 4, Thundercloud Gray is decisively the brighter choice.
Thundercloud Gray reflects far more light (LRV 50 vs 13), opening up a space where Bancha encloses it.
Thundercloud Gray reads slightly lighter (LRV 50 vs 44), a gap that shows most in low-lit rooms.
At LRV 84 vs 50, Pure White is decisively the brighter choice.
At LRV 50 vs 21, Thundercloud Gray is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 50), opening up a space where Thundercloud Gray encloses it.
Shoji White reflects far more light (LRV 74 vs 50), opening up a space where Thundercloud Gray encloses it.
Snowbound reflects far more light (LRV 83 vs 50), opening up a space where Thundercloud Gray encloses it.
Thundercloud Gray reflects far more light (LRV 50 vs 12), opening up a space where Pewter Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 50), opening up a space where Thundercloud Gray encloses it.
A 9-point LRV gap (50 vs 41) makes Thundercloud Gray the marginally brighter of the two.
At LRV 68 vs 50, Calamine is decisively the brighter choice.
At LRV 50 vs 25, Thundercloud Gray is decisively the brighter choice.
Thundercloud Gray reflects far more light (LRV 50 vs 12), opening up a space where Vintage Vogue encloses it.
Thundercloud Gray reads slightly lighter (LRV 50 vs 45), a gap that shows most in low-lit rooms.
At LRV 50 vs 31, Thundercloud Gray is decisively the brighter choice.
At LRV 50 vs 7, Thundercloud Gray is decisively the brighter choice.
At LRV 50 vs 24, Thundercloud Gray is decisively the brighter choice.
A 7-point LRV gap (57 vs 50) makes Guilford Green the marginally brighter of the two.
At LRV 72 vs 50, Just Walnut is decisively the brighter choice.