S 4010-B70G vs RAL 660-3
Where S 4010-B70G belongs to NCS's range, RAL 660-3 is a RAL Effect color. S 4010-B70G reads as blue-grey, while RAL 660-3 reads as blue — two distinct hue families, not close cousins. They have nearly identical light reflectance values (28 vs 27), so they'll read as similarly Medium in most lighting conditions. With a ΔE of 20.7, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. 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 RAL 660-3 in Real Spaces
1 real room side by side. Seeing S 4010-B70G and RAL 660-3 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
Color Details
S 4010-B70G vs RAL 660-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see S 4010-B70G on one side and RAL 660-3 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.
