Blue Grotto vs RAL 590-M
Blue Grotto is a Benjamin Moore color while RAL 590-M comes from RAL Effect. These are both blues, so the question isn't which hue to choose — it's where within blue to land. With LRVs of 6 and 5, they'll behave almost identically in terms of how much light they reflect back into a room. At ΔE 3.4, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Blue Grotto vs RAL 590-M in Real Spaces
1 real room side by side. Blue Grotto and RAL 590-M 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.
Color Details
Blue Grotto vs RAL 590-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Blue Grotto on one side and RAL 590-M 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 Blue Grotto comparisons
See how Blue Grotto stacks up against other well-photographed colors across different brands and tones.
