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.
