S 4010-B70G vs Portsmouth
S 4010-B70G (NCS) and Portsmouth (Sherwin-Williams) come from different manufacturers. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. The 6-point LRV gap — 28 for S 4010-B70G vs 22 for Portsmouth — means S 4010-B70G will open up a space more effectively. Where S 4010-B70G leans cool, Portsmouth reads neutral — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 6.1 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
S 4010-B70G vs Portsmouth Simulated Comparison
5 simulated room previews — drag the slider on each to see S 4010-B70G on one side and Portsmouth 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 S 4010-B70G comparisons
See how S 4010-B70G stacks up against other well-photographed colors across different brands and tones.
