Stepping Stone vs Castlegate
Where Stepping Stone belongs to PPG's range, Castlegate is a Sherwin-Williams color. These are both greys, so the question isn't which hue to choose — it's where within grey to land. They have nearly identical light reflectance values (39 vs 37), so they'll read as similarly Medium in most lighting conditions. At ΔE 2.0, 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 10 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Stepping Stone vs Castlegate in Real Spaces
10 real rooms side by side. Stepping Stone and Castlegate 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Dining Room
A dining room lit by a dimmed pendant or candles is one of the most forgiving environments for paint — warm light softens almost everything. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Home Office
The test for a home office color isn't how it looks in a quick glance — it's whether it still feels right after a full day of work. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Mudroom
Mudrooms are seen in passing, often under whatever light comes through the door — a context that favors colors with some depth. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Patio
Outside, paint color competes with sky, landscaping, and direct sun — all of which shift how both of these read compared to an indoor chip. 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
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
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
Stepping Stone vs Castlegate Simulated Comparison
5 simulated room previews — drag the slider on each to see Stepping Stone on one side and Castlegate 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 Stepping Stone comparisons
See how Stepping Stone stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 39, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 39), opening up a space where Stepping Stone encloses it.
Stepping Stone reflects far more light (LRV 39 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 39, Purbeck Stone is decisively the brighter choice.
A 9-point LRV gap (39 vs 30) makes Stepping Stone the marginally brighter of the two.
Mizzle reflects far more light (LRV 52 vs 39), opening up a space where Stepping Stone encloses it.
At LRV 60 vs 39, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 39), opening up a space where Stepping Stone encloses it.
Stepping Stone reflects far more light (LRV 39 vs 27), opening up a space where Denim Drift encloses it.
A 4-point LRV gap (43 vs 39) makes French Gray the marginally brighter of the two.
At LRV 39 vs 4, Stepping Stone is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 39), opening up a space where Stepping Stone encloses it.
Stepping Stone reflects far more light (LRV 39 vs 13), opening up a space where Bancha encloses it.
Hardwick White reads slightly lighter (LRV 44 vs 39), a gap that shows most in low-lit rooms.
At LRV 84 vs 39, Pure White is decisively the brighter choice.
At LRV 39 vs 21, Stepping Stone is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 39), opening up a space where Stepping Stone encloses it.
Shoji White reflects far more light (LRV 74 vs 39), opening up a space where Stepping Stone encloses it.
Snowbound reflects far more light (LRV 83 vs 39), opening up a space where Stepping Stone encloses it.
A 12-point LRV gap (51 vs 39) makes Pigeon the marginally brighter of the two.
Stepping Stone reflects far more light (LRV 39 vs 12), opening up a space where Pewter Green encloses it.
Stepping Stone reflects far more light (LRV 39 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 39), opening up a space where Stepping Stone encloses it.
Their light reflectance is nearly identical (LRV 41 vs 39), so neither reads brighter in a room.
Stepping Stone reflects far more light (LRV 39 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reads slightly lighter (LRV 45 vs 39), a gap that shows most in low-lit rooms.
A 8-point LRV gap (39 vs 31) makes Stepping Stone the marginally brighter of the two.