Oslo Blue vs Grey Blue
Oslo Blue (Behr) and Grey Blue (RAL Classic) come from different manufacturers. Hue-wise, Oslo Blue belongs to the blue family and Grey Blue to the blue-grey family. The 40-point LRV gap — 47 for Oslo Blue vs 7 for Grey Blue — means Oslo Blue will open up a space more effectively. A ΔE of 43.6 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.
Oslo Blue vs Grey Blue in Real Spaces
1 real room side by side. Seeing Oslo Blue and Grey Blue in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Color Details
Oslo Blue vs Grey Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Oslo Blue on one side and Grey Blue 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.
