Clam Shell vs Agreeable Gray
Clam Shell is a PPG color while Agreeable Gray comes from Sherwin-Williams. Both sit in the greige-grey family, which is useful context if you're narrowing within a single hue direction. At LRV 60 vs 18, Agreeable Gray will read as the brighter of the two — a 42-point gap that matters most in north-facing or low-light rooms. At ΔE 32.3, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 9 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Clam Shell vs Agreeable Gray in Real Spaces
9 real rooms side by side. Seeing Clam Shell and Agreeable Gray 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
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. Agreeable Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The LRV gap is large enough that Agreeable Gray will make the room feel meaningfully brighter than Clam Shell would.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The LRV gap is large enough that Agreeable Gray will make the room feel meaningfully brighter than Clam Shell would.
Dining Room
Dining room light is typically the warmest in the house, which shifts both colors toward the red end of the spectrum compared to daylight. Agreeable Gray reflects noticeably more light off the walls, making the space read more open than Clam Shell.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The LRV gap is large enough that Agreeable Gray will make the room feel meaningfully brighter than Clam Shell would.
Home Office
In a home office, wall color sits in your peripheral vision for hours at a time, so temperature and undertone matter more than you might expect. The LRV gap is large enough that Agreeable Gray will make the room feel meaningfully brighter than Clam Shell would.
Mudroom
A mudroom color needs to hold up under the most casual scrutiny: a glance as you're coming and going, often in mixed or artificial light. Agreeable Gray reflects noticeably more light off the walls, making the space read more open than Clam Shell.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. The LRV gap is large enough that Agreeable Gray will make the room feel meaningfully brighter than Clam Shell would.
Front Door
Front doors are seen in isolation against the rest of the facade, which makes them a high-stakes surface where even subtle differences matter. Agreeable Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Clam Shell vs Agreeable Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Clam Shell on one side and Agreeable 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 Clam Shell comparisons
See how Clam Shell stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 18, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 18), opening up a space where Clam Shell encloses it.
Clam Shell reflects far more light (LRV 18 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 18, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 18, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 18), opening up a space where Clam Shell encloses it.
Accessible Beige reflects far more light (LRV 58 vs 18), opening up a space where Clam Shell encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 18), a gap that shows most in low-lit rooms.
At LRV 43 vs 18, French Gray is decisively the brighter choice.
At LRV 18 vs 4, Clam Shell is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 18), opening up a space where Clam Shell encloses it.
Clam Shell reads slightly lighter (LRV 18 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 18), opening up a space where Clam Shell encloses it.
At LRV 84 vs 18, Pure White is decisively the brighter choice.
A 3-point LRV gap (21 vs 18) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 18), opening up a space where Clam Shell encloses it.
Shoji White reflects far more light (LRV 74 vs 18), opening up a space where Clam Shell encloses it.
Snowbound reflects far more light (LRV 83 vs 18), opening up a space where Clam Shell encloses it.
At LRV 51 vs 18, Pigeon is decisively the brighter choice.
Clam Shell reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Clam Shell reads slightly lighter (LRV 18 vs 8), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 18), opening up a space where Clam Shell encloses it.
At LRV 41 vs 18, Dix Blue is decisively the brighter choice.
Clam Shell reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 18), opening up a space where Clam Shell encloses it.
At LRV 31 vs 18, Pale Green is decisively the brighter choice.
A 11-point LRV gap (18 vs 7) makes Clam Shell the marginally brighter of the two.