RAL 640-1 vs Major Blue
Where RAL 640-1 belongs to RAL Effect's range, Major Blue is a Sherwin-Williams color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Major Blue (LRV 29) reflects noticeably more light than RAL 640-1 (LRV 26), a difference of 3 points that becomes especially apparent in rooms with limited natural light. The ΔE 4.5 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 640-1 vs Major Blue in Real Spaces
2 real rooms side by side. RAL 640-1 and Major Blue 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.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Major Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Major Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
RAL 640-1 vs Major Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 640-1 on one side and Major Blue 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 RAL 640-1 comparisons
See how RAL 640-1 stacks up against other well-photographed colors across different brands and tones.
