Oslo vs Blue grey
Oslo (Jotun) and Blue 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 5-point LRV gap — 16 for Blue grey vs 11 for Oslo — means Blue grey will open up a space more effectively. ΔE 3.5 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Oslo vs Blue grey in Real Spaces
2 real rooms side by side. Oslo and Blue grey are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
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. Blue grey reads slightly lighter here — a subtle but real difference in how open the space feels.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Blue grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Oslo vs Blue grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Oslo on one side and Blue 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 comparisons
See how Oslo stacks up against other well-photographed colors across different brands and tones.
