Coastal Blue vs RAL 810-3
Coastal Blue (Jotun) and RAL 810-3 (RAL Effect) come from different manufacturers. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. The 4-point LRV gap — 23 for RAL 810-3 vs 19 for Coastal Blue — means RAL 810-3 will open up a space more effectively. ΔE 4.4 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Coastal Blue vs RAL 810-3 in Real Spaces
1 real room side by side. Coastal Blue and RAL 810-3 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. RAL 810-3 reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Coastal Blue vs RAL 810-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Blue on one side and RAL 810-3 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 Coastal Blue comparisons
See how Coastal Blue stacks up against other well-photographed colors across different brands and tones.
