Acier vs Keystone Gray
Acier and Keystone Gray come from the same Sherwin-Williams collection. Acier reads as grey, while Keystone Gray reads as greige-grey — two distinct hue families, not close cousins. The 3-point LRV gap — 32 for Acier vs 29 for Keystone Gray — means Acier will open up a space more effectively. Where Acier leans neutral, Keystone Gray reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 5.0 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Acier vs Keystone Gray in Real Spaces
1 real room side by side. Acier and Keystone Gray 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.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Acier reads more restrained here, while Keystone Gray adds a sense of enclosure and warmth.
Color Details
Acier vs Keystone Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Acier on one side and Keystone Gray 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.