S 4500-N vs RAL 820-3
S 4500-N is a NCS color while RAL 820-3 comes from RAL Effect. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. With LRVs of 27 and 29, they'll behave almost identically in terms of how much light they reflect back into a room. At ΔE 3.8, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
S 4500-N vs RAL 820-3 in Real Spaces
2 real rooms side by side. S 4500-N and RAL 820-3 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.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. 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.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. 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.
Color Details
S 4500-N vs RAL 820-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see S 4500-N on one side and RAL 820-3 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 S 4500-N comparisons
See how S 4500-N stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 27, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 27), opening up a space where S 4500-N encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 27), a gap that shows most in low-lit rooms.
Agreeable Gray reflects far more light (LRV 60 vs 27), opening up a space where S 4500-N encloses it.
At LRV 58 vs 27, Accessible Beige is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 27 vs 27), so neither reads brighter in a room.
French Gray reflects far more light (LRV 43 vs 27), opening up a space where S 4500-N encloses it.
At LRV 55 vs 27, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 27, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 27), opening up a space where S 4500-N encloses it.
At LRV 66 vs 27, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 27, Shoji White is decisively the brighter choice.
At LRV 27 vs 12, S 4500-N is decisively the brighter choice.
At LRV 27 vs 8, S 4500-N is decisively the brighter choice.
At LRV 68 vs 27, Skimming Stone is decisively the brighter choice.
At LRV 27 vs 12, S 4500-N is decisively the brighter choice.
At LRV 45 vs 27, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 27), a gap that shows most in low-lit rooms.