Coastal Storm vs RAL 840-4
Where Coastal Storm belongs to Behr's range, RAL 840-4 is a RAL Effect color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. They have nearly identical light reflectance values (21 vs 21), so they'll read as similarly Dark in most lighting conditions. At ΔE 2.6, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Coastal Storm vs RAL 840-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Storm on one side and RAL 840-4 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 Coastal Storm comparisons
See how Coastal Storm stacks up against other well-photographed colors across different brands and tones.
