Granite Boulder vs RAL 770-5
Where Granite Boulder belongs to Behr's range, RAL 770-5 is a RAL Effect color. These are both greige-greys, so the question isn't which hue to choose — it's where within greige-grey to land. They have nearly identical light reflectance values (42 vs 43), so they'll read as similarly Medium in most lighting conditions. At ΔE 2.3, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Granite Boulder vs RAL 770-5 in Real Spaces
1 real room side by side. Granite Boulder and RAL 770-5 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. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
Granite Boulder vs RAL 770-5 Simulated Comparison
5 simulated room previews — drag the slider on each to see Granite Boulder on one side and RAL 770-5 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 Granite Boulder comparisons
See how Granite Boulder stacks up against other well-photographed colors across different brands and tones.
