St. John Blue vs RAL 180-M
St. John Blue is a Benjamin Moore color while RAL 180-M comes from RAL Effect. St. John Blue reads as blue, while RAL 180-M reads as blue-grey — two distinct hue families, not close cousins. With LRVs of 34 and 35, they'll behave almost identically in terms of how much light they reflect back into a room. At ΔE 6.3, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
St. John Blue vs RAL 180-M Simulated Comparison
5 simulated room previews — drag the slider on each to see St. John Blue on one side and RAL 180-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 St. John Blue comparisons
See how St. John Blue stacks up against other well-photographed colors across different brands and tones.
