Window grey vs Let it Rain
Where Window grey belongs to RAL Classic's range, Let it Rain is a Sherwin-Williams color. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. They have nearly identical light reflectance values (36 vs 34), so they'll read as similarly Medium in most lighting conditions. At ΔE 1.8, 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.
Window grey vs Let it Rain in Real Spaces
1 real room side by side. Window grey and Let it Rain 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.
Front Door
A front door is a focal point — small color differences read clearly at this concentrated scale. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Window grey vs Let it Rain Simulated Comparison
5 simulated room previews — drag the slider on each to see Window grey on one side and Let it Rain 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 Window grey comparisons
See how Window grey stacks up against other well-photographed colors across different brands and tones.
