RAL 720-6 vs L366
RAL 720-6 (RAL Effect) and L366 (Tikkurila) come from different manufacturers. These are both blues, so the question isn't which hue to choose — it's where within blue to land. The 4-point LRV gap — 15 for L366 vs 12 for RAL 720-6 — means L366 will open up a space more effectively. ΔE 5.5 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
RAL 720-6 vs L366 Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 720-6 on one side and L366 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 RAL 720-6 comparisons
See how RAL 720-6 stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 12), opening up a space where RAL 720-6 encloses it.
At LRV 52 vs 12, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 12, Evergreen Fog is decisively the brighter choice.
At LRV 60 vs 12, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 12), opening up a space where RAL 720-6 encloses it.
Denim Drift reflects far more light (LRV 27 vs 12), opening up a space where RAL 720-6 encloses it.
At LRV 43 vs 12, French Gray is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 12), opening up a space where RAL 720-6 encloses it.
Hardwick White reflects far more light (LRV 44 vs 12), opening up a space where RAL 720-6 encloses it.
At LRV 84 vs 12, Pure White is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 12), opening up a space where RAL 720-6 encloses it.
Shoji White reflects far more light (LRV 74 vs 12), opening up a space where RAL 720-6 encloses it.
With LRVs of 12 and 12, the two reflect almost the same amount of light.
RAL 720-6 reads slightly lighter (LRV 12 vs 8), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 12), opening up a space where RAL 720-6 encloses it.
With LRVs of 12 and 12, the two reflect almost the same amount of light.
Saybrook Sage reflects far more light (LRV 45 vs 12), opening up a space where RAL 720-6 encloses it.
At LRV 31 vs 12, Pale Green is decisively the brighter choice.