Ash Blue vs S 4010-B70G
Where Ash Blue belongs to Benjamin Moore's range, S 4010-B70G is a NCS color. Ash Blue reads as blue, while S 4010-B70G reads as blue-grey — two distinct hue families, not close cousins. They have nearly identical light reflectance values (30 vs 28), so they'll read as similarly Medium in most lighting conditions. Ash Blue runs blue while S 4010-B70G is decidedly cool, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 19.2, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Ash Blue vs S 4010-B70G Simulated Comparison
5 simulated room previews — drag the slider on each to see Ash Blue on one side and S 4010-B70G 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 Ash Blue comparisons
See how Ash Blue stacks up against other well-photographed colors across different brands and tones.
