Clam Shell vs Pewter Green
Where Clam Shell belongs to PPG's range, Pewter Green is a Sherwin-Williams color. Clam Shell reads as greige-grey, while Pewter Green reads as green-grey — two distinct hue families, not close cousins. Clam Shell (LRV 18) reflects noticeably more light than Pewter Green (LRV 12), a difference of 6 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 12.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Clam Shell vs Pewter Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Clam Shell on one side and Pewter Green 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.
