Celtic Blue vs S 3005-B20G
Celtic Blue (Benjamin Moore) and S 3005-B20G (NCS) 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 40-point LRV gap — 40 for S 3005-B20G vs 0 for Celtic Blue — means S 3005-B20G will open up a space more effectively. Where Celtic Blue leans cool, S 3005-B20G reads neutral — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 4.7 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
Celtic Blue vs S 3005-B20G Simulated Comparison
5 simulated room previews — drag the slider on each to see Celtic Blue on one side and S 3005-B20G 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 Celtic Blue comparisons
See how Celtic Blue stacks up against other well-photographed colors across different brands and tones.
