Pewter Green vs Poseidon
Both from Sherwin-Williams's palette. Hue-wise, Pewter Green belongs to the green-grey family and Poseidon to the blue family. They have nearly identical light reflectance values (12 vs 11), so they'll read as similarly Dark in most lighting conditions. Pewter Green runs neutral while Poseidon is decidedly cool, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 26.8, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Pewter Green vs Poseidon in Real Spaces
2 real rooms side by side. Seeing Pewter Green and Poseidon in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Poseidon brings more warmth to the space, while Pewter Green keeps things cooler and crisper.
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. Poseidon brings more warmth to the space, while Pewter Green keeps things cooler and crisper.
Color Details
Pewter Green vs Poseidon Simulated Comparison
5 simulated room previews — drag the slider on each to see Pewter Green on one side and Poseidon 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 Pewter Green comparisons
See how Pewter Green stacks up against other well-photographed colors across different brands and tones.
