Black grey vs RAL 660-3
Black grey (RAL Classic) and RAL 660-3 (RAL Effect) come from different manufacturers. Hue-wise, Black grey belongs to the blue-grey family and RAL 660-3 to the blue family. The 21-point LRV gap — 27 for RAL 660-3 vs 6 for Black grey — means RAL 660-3 will open up a space more effectively. A ΔE of 49.5 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Black grey vs RAL 660-3 in Real Spaces
3 real rooms side by side. Seeing Black grey 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
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. RAL 660-3 reflects noticeably more light off the walls, making the space read more open than Black grey.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. RAL 660-3 returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. RAL 660-3 returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Black grey vs RAL 660-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see Black grey 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 Black grey comparisons
See how Black grey stacks up against other well-photographed colors across different brands and tones.
