Polished Slate vs Neptune Seas
Where Polished Slate belongs to Benjamin Moore's range, Neptune Seas is a Dulux color. Polished Slate reads as blue, while Neptune Seas reads as blue-grey — two distinct hue families, not close cousins. Neptune Seas (LRV 19) reflects noticeably more light than Polished Slate (LRV 15), a difference of 4 points that becomes especially apparent in rooms with limited natural light. Polished Slate runs blue while Neptune Seas is decidedly cool, which means they'll respond very differently to warm vs cool light sources. The ΔE 6.0 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Polished Slate vs Neptune Seas Simulated Comparison
5 simulated room previews — drag the slider on each to see Polished Slate on one side and Neptune Seas 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 Polished Slate comparisons
See how Polished Slate stacks up against other well-photographed colors across different brands and tones.
