RAL 660-4 vs RAL 670-5
Both are RAL Effect colors. These are both blues, so the question isn't which hue to choose — it's where within blue to land. At LRV 35 vs 31, RAL 670-5 will read as the brighter of the two — a 4-point gap that matters most in north-facing or low-light rooms. At ΔE 6.2, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 6 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 660-4 vs RAL 670-5 in Real Spaces
6 real rooms side by side. RAL 660-4 and RAL 670-5 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. RAL 670-5 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The brightness difference is modest but present — RAL 670-5 gives the walls a little more lift.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The brightness difference is modest but present — RAL 670-5 gives the walls a little more lift.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The brightness difference is modest but present — RAL 670-5 gives the walls a little more lift.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. The brightness difference is modest but present — RAL 670-5 gives the walls a little more lift.
Color Details
RAL 660-4 vs RAL 670-5 Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 660-4 on one side and RAL 670-5 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 660-4 comparisons
See how RAL 660-4 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 31, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 31), opening up a space where RAL 660-4 encloses it.
With LRVs of 31 and 30, the two reflect almost the same amount of light.
Agreeable Gray reflects far more light (LRV 60 vs 31), opening up a space where RAL 660-4 encloses it.
At LRV 58 vs 31, Accessible Beige is decisively the brighter choice.
A 4-point LRV gap (31 vs 27) makes RAL 660-4 the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 31), opening up a space where RAL 660-4 encloses it.
At LRV 55 vs 31, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 31, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 31), opening up a space where RAL 660-4 encloses it.
At LRV 66 vs 31, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 31, Shoji White is decisively the brighter choice.
At LRV 31 vs 12, RAL 660-4 is decisively the brighter choice.
At LRV 31 vs 8, RAL 660-4 is decisively the brighter choice.
At LRV 68 vs 31, Skimming Stone is decisively the brighter choice.
At LRV 31 vs 12, RAL 660-4 is decisively the brighter choice.
At LRV 45 vs 31, Saybrook Sage is decisively the brighter choice.
With LRVs of 31 and 31, the two reflect almost the same amount of light.