Rainbow Bright vs RAL 640-M
Where Rainbow Bright belongs to PPG's range, RAL 640-M 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. Rainbow Bright (LRV 14) reflects noticeably more light than RAL 640-M (LRV 5), a difference of 9 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 13.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Rainbow Bright vs RAL 640-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Rainbow Bright 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 Rainbow Bright comparisons
See how Rainbow Bright stacks up against other well-photographed colors across different brands and tones.
