RAL 660-6 vs Cloudless
RAL 660-6 is a RAL Effect color while Cloudless comes from Sherwin-Williams. These are both blues, so the question isn't which hue to choose — it's where within blue to land. At LRV 56 vs 47, Cloudless will read as the brighter of the two — a 9-point gap that matters most in north-facing or low-light rooms. With a ΔE of 2.8, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 660-6 vs Cloudless in Real Spaces
2 real rooms side by side. RAL 660-6 and Cloudless 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
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. Cloudless returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
RAL 660-6 vs Cloudless Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 660-6 on one side and Cloudless 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 660-6 comparisons
See how RAL 660-6 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 47, White Dove is decisively the brighter choice.
Purbeck Stone reads slightly lighter (LRV 52 vs 47), a gap that shows most in low-lit rooms.
RAL 660-6 reflects far more light (LRV 47 vs 30), opening up a space where Evergreen Fog encloses it.
Agreeable Gray reflects far more light (LRV 60 vs 47), opening up a space where RAL 660-6 encloses it.
A 10-point LRV gap (58 vs 47) makes Accessible Beige the marginally brighter of the two.
At LRV 47 vs 27, RAL 660-6 is decisively the brighter choice.
RAL 660-6 reads slightly lighter (LRV 47 vs 43), a gap that shows most in low-lit rooms.
A 8-point LRV gap (55 vs 47) makes Tranquil Dawn the marginally brighter of the two.
A 4-point LRV gap (47 vs 44) makes RAL 660-6 the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 47), opening up a space where RAL 660-6 encloses it.
At LRV 66 vs 47, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 47, Shoji White is decisively the brighter choice.
At LRV 47 vs 12, RAL 660-6 is decisively the brighter choice.
At LRV 47 vs 8, RAL 660-6 is decisively the brighter choice.
At LRV 68 vs 47, Skimming Stone is decisively the brighter choice.
At LRV 47 vs 12, RAL 660-6 is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 47 vs 45), so neither reads brighter in a room.
RAL 660-6 reflects far more light (LRV 47 vs 31), opening up a space where Pale Green encloses it.