Teton Blue vs RAL 820-3
Where Teton Blue belongs to Behr's range, RAL 820-3 is a RAL Effect color. Hue-wise, Teton Blue belongs to the blue-grey family and RAL 820-3 to the grey family. They have nearly identical light reflectance values (31 vs 29), so they'll read as similarly Medium in most lighting conditions. The ΔE 4.4 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. 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 820-3 in Real Spaces
3 real rooms side by side. Teton Blue and RAL 820-3 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.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. The distinction reads clearly at room scale, making the choice between them concrete.
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. The distinction reads clearly at room scale, making the choice between them concrete.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
Teton Blue vs RAL 820-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see Teton Blue on one side and RAL 820-3 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.
