S 5010-R90B vs K431
S 5010-R90B (NCS) and K431 (Tikkurila) come from different manufacturers. S 5010-R90B reads as blue-grey, while K431 reads as blue — two distinct hue families, not close cousins. Their light reflectance values are nearly the same — 19 vs 18 — so neither will read significantly brighter or darker than the other. A ΔE of 13.9 puts these firmly in different territory — two distinct design choices rather than close alternatives. 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 K431 Simulated Comparison
5 simulated room previews — drag the slider on each to see S 5010-R90B on one side and K431 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.
