RAL 780-4 vs Cupola Yellow
Where RAL 780-4 belongs to RAL Effect's range, Cupola Yellow is a Sherwin-Williams color. RAL 780-4 reads as beige, while Cupola Yellow reads as beige-yellow — two distinct hue families, not close cousins. Cupola Yellow (LRV 53) reflects noticeably more light than RAL 780-4 (LRV 47), a difference of 7 points that becomes especially apparent in rooms with limited natural light. The ΔE 4.2 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. 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 780-4 vs Cupola Yellow Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 780-4 on one side and Cupola Yellow 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 780-4 comparisons
See how RAL 780-4 stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 47), opening up a space where RAL 780-4 encloses it.
A 5-point LRV gap (52 vs 47) makes Purbeck Stone the marginally brighter of the two.
At LRV 47 vs 30, RAL 780-4 is decisively the brighter choice.
At LRV 60 vs 47, Agreeable Gray is decisively the brighter choice.
Accessible Beige reads slightly lighter (LRV 58 vs 47), a gap that shows most in low-lit rooms.
RAL 780-4 reflects far more light (LRV 47 vs 27), opening up a space where Denim Drift encloses it.
A 3-point LRV gap (47 vs 43) makes RAL 780-4 the marginally brighter of the two.
Tranquil Dawn reads slightly lighter (LRV 55 vs 47), a gap that shows most in low-lit rooms.
With LRVs of 47 and 44, the two reflect almost the same amount of light.
At LRV 84 vs 47, Pure White is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 47), opening up a space where RAL 780-4 encloses it.
Shoji White reflects far more light (LRV 74 vs 47), opening up a space where RAL 780-4 encloses it.
RAL 780-4 reflects far more light (LRV 47 vs 12), opening up a space where Pewter Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 47), opening up a space where RAL 780-4 encloses it.
RAL 780-4 reflects far more light (LRV 47 vs 12), opening up a space where Vintage Vogue encloses it.
With LRVs of 47 and 45, the two reflect almost the same amount of light.
At LRV 47 vs 31, RAL 780-4 is decisively the brighter choice.
At LRV 47 vs 7, RAL 780-4 is decisively the brighter choice.
At LRV 47 vs 24, RAL 780-4 is decisively the brighter choice.
A 11-point LRV gap (57 vs 47) makes Guilford Green the marginally brighter of the two.