S 4010-B70G vs Black grey
S 4010-B70G (NCS) and Black grey (RAL Classic) 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 21-point LRV gap — 28 for S 4010-B70G vs 6 for Black grey — means S 4010-B70G will open up a space more effectively. A ΔE of 39.7 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
S 4010-B70G vs Black grey in Real Spaces
1 real room side by side. Seeing S 4010-B70G and Black grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. S 4010-B70G reflects noticeably more light off the walls, making the space read more open than Black grey.
Color Details
S 4010-B70G vs Black grey Simulated Comparison
5 simulated room previews — drag the slider on each to see S 4010-B70G on one side and Black grey 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 4010-B70G comparisons
See how S 4010-B70G stacks up against other well-photographed colors across different brands and tones.
