S 5010-R90B vs Old Mill Blue
Where S 5010-R90B belongs to NCS's range, Old Mill Blue is a PPG color. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. They have nearly identical light reflectance values (19 vs 17), so they'll read as similarly Dark in most lighting conditions. The ΔE 7.6 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
S 5010-R90B vs Old Mill Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see S 5010-R90B on one side and Old Mill Blue 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 5010-R90B comparisons
See how S 5010-R90B stacks up against other well-photographed colors across different brands and tones.
