RAL 820-4 vs Downing Slate
Where RAL 820-4 belongs to RAL Effect's range, Downing Slate is a Sherwin-Williams color. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. They have nearly identical light reflectance values (23 vs 21), so they'll read as similarly Dark in most lighting conditions. At ΔE 2.9, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 820-4 vs Downing Slate in Real Spaces
4 real rooms side by side. RAL 820-4 and Downing Slate 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. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
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. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
RAL 820-4 vs Downing Slate Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 820-4 on one side and Downing Slate 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 820-4 comparisons
See how RAL 820-4 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 23, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 23), opening up a space where RAL 820-4 encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 23), a gap that shows most in low-lit rooms.
Agreeable Gray reflects far more light (LRV 60 vs 23), opening up a space where RAL 820-4 encloses it.
At LRV 58 vs 23, Accessible Beige is decisively the brighter choice.
A 4-point LRV gap (27 vs 23) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 23), opening up a space where RAL 820-4 encloses it.
At LRV 55 vs 23, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 23, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 23), opening up a space where RAL 820-4 encloses it.
At LRV 66 vs 23, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 23, Shoji White is decisively the brighter choice.
A 11-point LRV gap (23 vs 12) makes RAL 820-4 the marginally brighter of the two.
At LRV 68 vs 23, Skimming Stone is decisively the brighter choice.
A 11-point LRV gap (23 vs 12) makes RAL 820-4 the marginally brighter of the two.
At LRV 45 vs 23, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 23), a gap that shows most in low-lit rooms.
RAL 820-4 reflects far more light (LRV 23 vs 7), opening up a space where Pine Needle encloses it.
With LRVs of 24 and 23, the two reflect almost the same amount of light.
Guilford Green reflects far more light (LRV 57 vs 23), opening up a space where RAL 820-4 encloses it.