Granite Boulder vs RAL 840-3
Granite Boulder (Behr) and RAL 840-3 (RAL Effect) come from different manufacturers. These are both greige-greys, so the question isn't which hue to choose — it's where within greige-grey to land. The 3-point LRV gap — 46 for RAL 840-3 vs 42 for Granite Boulder — means RAL 840-3 will open up a space more effectively. A ΔE of 2.3 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Granite Boulder vs RAL 840-3 in Real Spaces
2 real rooms side by side. Granite Boulder and RAL 840-3 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.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. RAL 840-3 reads slightly lighter here — a subtle but real difference in how open the space feels.
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. RAL 840-3 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Granite Boulder vs RAL 840-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see Granite Boulder on one side and RAL 840-3 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 Granite Boulder comparisons
See how Granite Boulder stacks up against other well-photographed colors across different brands and tones.
