S 5010-R90B vs Perfect Periwinkle
S 5010-R90B (NCS) and Perfect Periwinkle (Sherwin-Williams) come from different manufacturers. S 5010-R90B reads as blue-grey, while Perfect Periwinkle reads as blue — two distinct hue families, not close cousins. The 4-point LRV gap — 23 for Perfect Periwinkle vs 19 for S 5010-R90B — means Perfect Periwinkle will open up a space more effectively. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 19.2 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 Perfect Periwinkle Simulated Comparison
5 simulated room previews — drag the slider on each to see S 5010-R90B on one side and Perfect Periwinkle 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.
