Stone Gray vs Keystone Gray
Stone Gray (PPG) and Keystone Gray (Sherwin-Williams) 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. Their light reflectance values are nearly the same — 30 vs 29 — so neither will read significantly brighter or darker than the other. A ΔE of 1.3 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Stone Gray vs Keystone Gray in Real Spaces
3 real rooms side by side. Stone Gray 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.
Dining Room
Dining rooms often rely on warm incandescent or candlelight, which flatters warm undertones and mutes cool ones. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
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. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
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. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Color Details
Stone Gray vs Keystone Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Stone Gray 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.
More Stone Gray comparisons
See how Stone Gray stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 30), opening up a space where Stone Gray encloses it.
At LRV 83 vs 30, White Dove is decisively the brighter choice.
At LRV 30 vs 6, Stone Gray is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 30), opening up a space where Stone Gray encloses it.
With LRVs of 30 and 30, the two reflect almost the same amount of light.
At LRV 52 vs 30, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 30), opening up a space where Stone Gray encloses it.
At LRV 58 vs 30, Accessible Beige is decisively the brighter choice.
A 3-point LRV gap (30 vs 27) makes Stone Gray the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 30), opening up a space where Stone Gray encloses it.
Stone Gray reflects far more light (LRV 30 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 30, Tranquil Dawn is decisively the brighter choice.
At LRV 30 vs 13, Stone Gray is decisively the brighter choice.
At LRV 44 vs 30, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 30), opening up a space where Stone Gray encloses it.
Stone Gray reads slightly lighter (LRV 30 vs 21), a gap that shows most in low-lit rooms.
At LRV 66 vs 30, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 30, Shoji White is decisively the brighter choice.
At LRV 83 vs 30, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 30), opening up a space where Stone Gray encloses it.
At LRV 30 vs 12, Stone Gray is decisively the brighter choice.
At LRV 30 vs 8, Stone Gray is decisively the brighter choice.
At LRV 68 vs 30, Skimming Stone is decisively the brighter choice.
Dix Blue reads slightly lighter (LRV 41 vs 30), a gap that shows most in low-lit rooms.
At LRV 30 vs 12, Stone Gray is decisively the brighter choice.
At LRV 45 vs 30, Saybrook Sage is decisively the brighter choice.
With LRVs of 31 and 30, the two reflect almost the same amount of light.