Neptune Seas vs Cement grey
Neptune Seas (Dulux) and Cement grey (RAL Classic) come from different manufacturers. Neptune Seas reads as blue-grey, while Cement grey reads as grey — two distinct hue families, not close cousins. The 5-point LRV gap — 24 for Cement grey vs 19 for Neptune Seas — means Cement grey will open up a space more effectively. A ΔE of 11.1 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Neptune Seas vs Cement grey in Real Spaces
1 real room side by side. Seeing Neptune Seas and Cement grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Cement grey reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Neptune Seas vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Neptune Seas on one side and Cement grey 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.
