Seaside Blue vs RAL 660-6
Where Seaside Blue belongs to Benjamin Moore's range, RAL 660-6 is a RAL Effect color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. They have nearly identical light reflectance values (47 vs 47), so they'll read as similarly Medium in most lighting conditions. The ΔE 3.2 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Seaside Blue vs RAL 660-6 Simulated Comparison
5 simulated room previews — drag the slider on each to see Seaside Blue on one side and RAL 660-6 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 Seaside Blue comparisons
See how Seaside Blue stacks up against other well-photographed colors across different brands and tones.
