Neptune Seas vs Rocky River
Neptune Seas (Dulux) and Rocky River (Sherwin-Williams) come from different manufacturers. Hue-wise, Neptune Seas belongs to the blue-grey family and Rocky River to the blue-green family. The 4-point LRV gap — 19 for Neptune Seas vs 15 for Rocky River — means Neptune Seas will open up a space more effectively. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. ΔE 3.7 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Neptune Seas vs Rocky River in Real Spaces
2 real rooms side by side. Neptune Seas and Rocky River 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.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Neptune Seas reads slightly lighter here — a subtle but real difference in how open the space feels.
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 — Neptune Seas gives the walls a little more lift.
Color Details
Neptune Seas vs Rocky River Simulated Comparison
5 simulated room previews — drag the slider on each to see Neptune Seas on one side and Rocky River 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 Neptune Seas comparisons
See how Neptune Seas stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 19), opening up a space where Neptune Seas encloses it.
At LRV 83 vs 19, White Dove is decisively the brighter choice.
At LRV 19 vs 6, Neptune Seas is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 19), opening up a space where Neptune Seas encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 19), a gap that shows most in low-lit rooms.
At LRV 52 vs 19, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 19), opening up a space where Neptune Seas encloses it.
At LRV 58 vs 19, Accessible Beige is decisively the brighter choice.
A 8-point LRV gap (27 vs 19) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 19), opening up a space where Neptune Seas encloses it.
Neptune Seas reflects far more light (LRV 19 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 19, Tranquil Dawn is decisively the brighter choice.
A 6-point LRV gap (19 vs 13) makes Neptune Seas the marginally brighter of the two.
At LRV 44 vs 19, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 19), opening up a space where Neptune Seas encloses it.
With LRVs of 21 and 19, the two reflect almost the same amount of light.
At LRV 66 vs 19, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 19, Shoji White is decisively the brighter choice.
At LRV 83 vs 19, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 19), opening up a space where Neptune Seas encloses it.
A 7-point LRV gap (19 vs 12) makes Neptune Seas the marginally brighter of the two.
A 11-point LRV gap (19 vs 8) makes Neptune Seas the marginally brighter of the two.
At LRV 68 vs 19, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 19), opening up a space where Neptune Seas encloses it.
A 7-point LRV gap (19 vs 12) makes Neptune Seas the marginally brighter of the two.
At LRV 45 vs 19, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 19), opening up a space where Neptune Seas encloses it.