Neptune Seas vs Riverway
Neptune Seas is a Dulux color while Riverway comes from Sherwin-Williams. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. At LRV 19 vs 16, Neptune Seas will read as the brighter of the two — a 3-point gap that matters most in north-facing or low-light rooms. They share a cool quality — useful to know if you're layering them in the same space. At ΔE 3.0, 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.
Neptune Seas vs Riverway in Real Spaces
2 real rooms side by side. Neptune Seas and Riverway 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
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. Neptune Seas has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Dining Room
Dining room light is typically the warmest in the house, which shifts both colors toward the red end of the spectrum compared to daylight. Neptune Seas reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Neptune Seas vs Riverway Simulated Comparison
5 simulated room previews — drag the slider on each to see Neptune Seas on one side and Riverway 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.
