Oslo Blue vs Black grey
Oslo Blue is a Behr color while Black grey comes from RAL Classic. Hue-wise, Oslo Blue belongs to the blue family and Black grey to the blue-grey family. At LRV 47 vs 6, Oslo Blue will read as the brighter of the two — a 40-point gap that matters most in north-facing or low-light rooms. At ΔE 54.8, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Oslo Blue vs Black grey in Real Spaces
1 real room side by side. Seeing Oslo Blue 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.
Front Door
Front doors are seen in isolation against the rest of the facade, which makes them a high-stakes surface where even subtle differences matter. Oslo Blue returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Oslo Blue vs Black grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Oslo Blue 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 Oslo Blue comparisons
See how Oslo Blue stacks up against other well-photographed colors across different brands and tones.
