RAL 820-4 vs Perennial Green
Where RAL 820-4 belongs to RAL Effect's range, Perennial Green is a Sherwin-Williams color. RAL 820-4 reads as blue-grey, while Perennial Green reads as green — two distinct hue families, not close cousins. Perennial Green (LRV NaN) reflects noticeably more light than RAL 820-4 (LRV 23), a difference of NaN points that becomes especially apparent in rooms with limited natural light. With a ΔE of NaN, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 820-4 vs Perennial Green in Real Spaces
2 real rooms side by side. Seeing RAL 820-4 and Perennial Green in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. 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 Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
RAL 820-4 vs Perennial Green Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 820-4 on one side and Perennial Green 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.
