Teton Blue vs RAL 640-M
Teton Blue (Behr) and RAL 640-M (RAL Effect) come from different manufacturers. Teton Blue reads as blue-grey, while RAL 640-M reads as blue — two distinct hue families, not close cousins. The 25-point LRV gap — 31 for Teton Blue vs 5 for RAL 640-M — means Teton Blue will open up a space more effectively. A ΔE of 44.2 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Teton Blue vs RAL 640-M in Real Spaces
3 real rooms side by side. Seeing Teton Blue and RAL 640-M in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Teton Blue returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Teton Blue returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Teton Blue returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Teton Blue vs RAL 640-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Teton 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 Teton Blue comparisons
See how Teton Blue stacks up against other well-photographed colors across different brands and tones.
