Obsidian vs RAL 820-5
Obsidian is a PPG color while RAL 820-5 comes from RAL Effect. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. With LRVs of 8 and 9, they'll behave almost identically in terms of how much light they reflect back into a room. At ΔE 4.2, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Obsidian vs RAL 820-5 in Real Spaces
5 real rooms side by side. Obsidian and RAL 820-5 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. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a 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.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. 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.
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
Obsidian vs RAL 820-5 Simulated Comparison
5 simulated room previews — drag the slider on each to see Obsidian on one side and RAL 820-5 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 Obsidian comparisons
See how Obsidian stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 8, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 8), opening up a space where Obsidian encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 8), opening up a space where Obsidian encloses it.
Agreeable Gray reflects far more light (LRV 60 vs 8), opening up a space where Obsidian encloses it.
At LRV 58 vs 8, Accessible Beige is decisively the brighter choice.
At LRV 27 vs 8, Denim Drift is decisively the brighter choice.
French Gray reflects far more light (LRV 43 vs 8), opening up a space where Obsidian encloses it.
At LRV 55 vs 8, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 8, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 8), opening up a space where Obsidian encloses it.
At LRV 66 vs 8, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 8, Shoji White is decisively the brighter choice.
A 4-point LRV gap (12 vs 8) makes Pewter Green the marginally brighter of the two.
Their light reflectance is nearly identical (LRV 8 vs 8), so neither reads brighter in a room.
At LRV 68 vs 8, Skimming Stone is decisively the brighter choice.
A 4-point LRV gap (12 vs 8) makes Vintage Vogue the marginally brighter of the two.
At LRV 45 vs 8, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 8), opening up a space where Obsidian encloses it.