Pewter Cast vs Porpoise
Both from Sherwin-Williams's palette. Hue-wise, Pewter Cast belongs to the grey family and Porpoise to the greige-grey family. Pewter Cast (LRV 31) reflects noticeably more light than Porpoise (LRV 13), a difference of 18 points that becomes especially apparent in rooms with limited natural light. Pewter Cast runs neutral while Porpoise is decidedly warm, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 20.5, 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 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Pewter Cast vs Porpoise in Real Spaces
3 real rooms side by side. Seeing Pewter Cast and Porpoise in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Pewter Cast reflects noticeably more light off the walls, making the space read more open than Porpoise.
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. Pewter Cast reflects noticeably more light off the walls, making the space read more open than Porpoise.
Front Door
A front door is a focal point — small color differences read clearly at this concentrated scale. The LRV gap is large enough that Pewter Cast will make the room feel meaningfully brighter than Porpoise would.
Color Details
Pewter Cast vs Porpoise Simulated Comparison
5 simulated room previews — drag the slider on each to see Pewter Cast on one side and Porpoise 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 Cast comparisons
See how Pewter Cast stacks up against other well-photographed colors across different brands and tones.
