Treron vs Window grey
Treron (Farrow & Ball) and Window grey (RAL Classic) come from different manufacturers. Hue-wise, Treron belongs to the greige-grey family and Window grey to the blue-grey family. The 11-point LRV gap — 36 for Window grey vs 25 for Treron — means Window grey will open up a space more effectively. A ΔE of 14.9 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.
Treron vs Window grey in Real Spaces
3 real rooms side by side. Seeing Treron and Window grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Window grey reflects noticeably more light off the walls, making the space read more open than Treron.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Window grey reflects noticeably more light off the walls, making the space read more open than Treron.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. Window grey returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Treron vs Window grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Treron on one side and Window grey 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 Treron comparisons
See how Treron stacks up against other well-photographed colors across different brands and tones.
