RAL 660-2 vs Blue Mosque
Where RAL 660-2 belongs to RAL Effect's range, Blue Mosque is a Sherwin-Williams color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Blue Mosque (LRV 17) reflects noticeably more light than RAL 660-2 (LRV 14), a difference of 3 points that becomes especially apparent in rooms with limited natural light. The ΔE 5.0 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 660-2 vs Blue Mosque in Real Spaces
5 real rooms side by side. RAL 660-2 and Blue Mosque 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. The distinction reads clearly at room scale, making the choice between them concrete.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. The distinction reads clearly at room scale, making the choice between them concrete.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. The distinction reads clearly at room scale, making the choice between them concrete.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
RAL 660-2 vs Blue Mosque Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 660-2 on one side and Blue Mosque 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.