RAL 660-2 vs L366
Where RAL 660-2 belongs to RAL Effect's range, L366 is a Tikkurila color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. They have nearly identical light reflectance values (14 vs 15), so they'll read as similarly Dark in most lighting conditions. With a ΔE of 11.3, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. 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 660-2 vs L366 Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 660-2 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 660-2 comparisons
See how RAL 660-2 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 14, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 14), opening up a space where RAL 660-2 encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 14), opening up a space where RAL 660-2 encloses it.
Agreeable Gray reflects far more light (LRV 60 vs 14), opening up a space where RAL 660-2 encloses it.
At LRV 58 vs 14, Accessible Beige is decisively the brighter choice.
At LRV 27 vs 14, Denim Drift is decisively the brighter choice.
French Gray reflects far more light (LRV 43 vs 14), opening up a space where RAL 660-2 encloses it.
At LRV 55 vs 14, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 14, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 14), opening up a space where RAL 660-2 encloses it.
At LRV 66 vs 14, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 14, Shoji White is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 14 vs 12), so neither reads brighter in a room.
A 6-point LRV gap (14 vs 8) makes RAL 660-2 the marginally brighter of the two.
At LRV 68 vs 14, Skimming Stone is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 14 vs 12), so neither reads brighter in a room.
At LRV 45 vs 14, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 14), opening up a space where RAL 660-2 encloses it.