Twilight Blue vs RAL 640-M
Twilight Blue (Benjamin Moore) and RAL 640-M (RAL Effect) come from different manufacturers. These are both blues, so the question isn't which hue to choose — it's where within blue to land. The 7-point LRV gap — 12 for Twilight Blue vs 5 for RAL 640-M — means Twilight Blue will open up a space more effectively. ΔE 9.6 means they're clearly different, but not dramatically so — they'd pair well in the same 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
Twilight Blue vs RAL 640-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Twilight Blue on one side and RAL 640-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 Twilight Blue comparisons
See how Twilight Blue stacks up against other well-photographed colors across different brands and tones.
