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.
Ammonite reflects far more light (LRV 69 vs 19), opening up a space where Coastal Blue encloses it.
At LRV 83 vs 19, White Dove is decisively the brighter choice.
At LRV 19 vs 6, Coastal Blue is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 19), opening up a space where Coastal Blue encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 19), a gap that shows most in low-lit rooms.
At LRV 52 vs 19, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 19), opening up a space where Coastal Blue encloses it.
At LRV 58 vs 19, Accessible Beige is decisively the brighter choice.
A 8-point LRV gap (27 vs 19) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 19), opening up a space where Coastal Blue encloses it.
Coastal Blue reflects far more light (LRV 19 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 19, Tranquil Dawn is decisively the brighter choice.
A 6-point LRV gap (19 vs 13) makes Coastal Blue the marginally brighter of the two.
At LRV 44 vs 19, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 19), opening up a space where Coastal Blue encloses it.
With LRVs of 21 and 19, the two reflect almost the same amount of light.
At LRV 66 vs 19, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 19, Shoji White is decisively the brighter choice.
At LRV 83 vs 19, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 19), opening up a space where Coastal Blue encloses it.
A 7-point LRV gap (19 vs 12) makes Coastal Blue the marginally brighter of the two.
A 11-point LRV gap (19 vs 8) makes Coastal Blue the marginally brighter of the two.
At LRV 68 vs 19, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 19), opening up a space where Coastal Blue encloses it.
A 7-point LRV gap (19 vs 12) makes Coastal Blue the marginally brighter of the two.
At LRV 45 vs 19, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 19), a gap that shows most in low-lit rooms.