Cool Slate vs Pewter Green
Where Cool Slate belongs to PPG's range, Pewter Green is a Sherwin-Williams color. Cool Slate reads as greige-grey, while Pewter Green reads as green-grey — two distinct hue families, not close cousins. Cool Slate (LRV 62) reflects noticeably more light than Pewter Green (LRV 12), a difference of 50 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 41.4, 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 10 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cool Slate vs Pewter Green in Real Spaces
10 real rooms side by side. Seeing Cool Slate and Pewter Green 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
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 LRV gap is large enough that Cool Slate will make the room feel meaningfully brighter than Pewter Green would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Cool Slate reflects noticeably more light off the walls, making the space read more open than Pewter Green.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. Cool Slate reflects noticeably more light off the walls, making the space read more open than Pewter Green.
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. Cool Slate returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Cool Slate reflects noticeably more light off the walls, making the space read more open than Pewter Green.
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. Cool Slate reflects noticeably more light off the walls, making the space read more open than Pewter Green.
Mudroom
Mudrooms are seen in passing, often under whatever light comes through the door — a context that favors colors with some depth. Cool Slate returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Cool Slate returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Cool Slate reflects noticeably more light off the walls, making the space read more open than Pewter Green.
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 Cool Slate will make the room feel meaningfully brighter than Pewter Green would.
Color Details
Cool Slate vs Pewter Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Cool Slate 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 Cool Slate comparisons
See how Cool Slate stacks up against other well-photographed colors across different brands and tones.
Ammonite reads slightly lighter (LRV 69 vs 62), a gap that shows most in low-lit rooms.
At LRV 83 vs 62, White Dove is decisively the brighter choice.
At LRV 62 vs 6, Cool Slate is decisively the brighter choice.
Cool Slate reads slightly lighter (LRV 62 vs 52), a gap that shows most in low-lit rooms.
Cool Slate reflects far more light (LRV 62 vs 30), opening up a space where Evergreen Fog encloses it.
A 10-point LRV gap (62 vs 52) makes Cool Slate the marginally brighter of the two.
With LRVs of 62 and 60, the two reflect almost the same amount of light.
A 4-point LRV gap (62 vs 58) makes Cool Slate the marginally brighter of the two.
At LRV 62 vs 27, Cool Slate is decisively the brighter choice.
Cool Slate reflects far more light (LRV 62 vs 43), opening up a space where French Gray encloses it.
Cool Slate reflects far more light (LRV 62 vs 4), opening up a space where Naval encloses it.
A 7-point LRV gap (62 vs 55) makes Cool Slate the marginally brighter of the two.
At LRV 62 vs 13, Cool Slate is decisively the brighter choice.
At LRV 62 vs 44, Cool Slate is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 62), opening up a space where Cool Slate encloses it.
Cool Slate reflects far more light (LRV 62 vs 21), opening up a space where Artichoke encloses it.
A 4-point LRV gap (66 vs 62) makes Balboa Mist the marginally brighter of the two.
At LRV 74 vs 62, Shoji White is decisively the brighter choice.
At LRV 83 vs 62, Snowbound is decisively the brighter choice.
Cool Slate reads slightly lighter (LRV 62 vs 51), a gap that shows most in low-lit rooms.
At LRV 62 vs 8, Cool Slate is decisively the brighter choice.
A 6-point LRV gap (68 vs 62) makes Skimming Stone the marginally brighter of the two.
Cool Slate reflects far more light (LRV 62 vs 41), opening up a space where Dix Blue encloses it.
At LRV 62 vs 12, Cool Slate is decisively the brighter choice.
At LRV 62 vs 45, Cool Slate is decisively the brighter choice.
Cool Slate reflects far more light (LRV 62 vs 31), opening up a space where Pale Green encloses it.
Cool Slate reflects far more light (LRV 62 vs 7), opening up a space where Pine Needle encloses it.