Gem Silica vs Just Walnut
Where Gem Silica belongs to Behr's range, Just Walnut is a Dulux color. Gem Silica reads as green, while Just Walnut reads as beige-greige — two distinct hue families, not close cousins. Just Walnut (LRV 72) reflects noticeably more light than Gem Silica (LRV 39), a difference of 33 points that becomes especially apparent in rooms with limited natural light. Gem Silica runs green while Just Walnut is decidedly warm, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 36.5, 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 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Gem Silica vs Just Walnut in Real Spaces
5 real rooms side by side. Seeing Gem Silica and Just Walnut 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 Just Walnut will make the room feel meaningfully brighter than Gem Silica 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. Just Walnut reflects noticeably more light off the walls, making the space read more open than Gem Silica.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. Just Walnut reflects noticeably more light off the walls, making the space read more open than Gem Silica.
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. Just Walnut reflects noticeably more light off the walls, making the space read more open than Gem Silica.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Just Walnut reflects noticeably more light off the walls, making the space read more open than Gem Silica.
Color Details
Gem Silica vs Just Walnut Simulated Comparison
5 simulated room previews — drag the slider on each to see Gem Silica on one side and Just Walnut 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 Gem Silica comparisons
See how Gem Silica stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 39), opening up a space where Gem Silica encloses it.
At LRV 83 vs 39, White Dove is decisively the brighter choice.
At LRV 39 vs 6, Gem Silica is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 39), opening up a space where Gem Silica encloses it.
Gem Silica reads slightly lighter (LRV 39 vs 30), a gap that shows most in low-lit rooms.
At LRV 52 vs 39, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 39), opening up a space where Gem Silica encloses it.
At LRV 58 vs 39, Accessible Beige is decisively the brighter choice.
At LRV 39 vs 27, Gem Silica is decisively the brighter choice.
French Gray reads slightly lighter (LRV 43 vs 39), a gap that shows most in low-lit rooms.
Gem Silica reflects far more light (LRV 39 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 39, Tranquil Dawn is decisively the brighter choice.
At LRV 39 vs 13, Gem Silica is decisively the brighter choice.
A 4-point LRV gap (44 vs 39) makes Hardwick White the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 39), opening up a space where Gem Silica encloses it.
Gem Silica reflects far more light (LRV 39 vs 21), opening up a space where Artichoke encloses it.
At LRV 66 vs 39, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 39, Shoji White is decisively the brighter choice.
At LRV 83 vs 39, Snowbound is decisively the brighter choice.
Pigeon reads slightly lighter (LRV 51 vs 39), a gap that shows most in low-lit rooms.
At LRV 39 vs 12, Gem Silica is decisively the brighter choice.
At LRV 39 vs 8, Gem Silica is decisively the brighter choice.
At LRV 68 vs 39, Skimming Stone is decisively the brighter choice.
With LRVs of 41 and 39, the two reflect almost the same amount of light.
At LRV 39 vs 12, Gem Silica is decisively the brighter choice.
A 6-point LRV gap (45 vs 39) makes Saybrook Sage the marginally brighter of the two.
Gem Silica reads slightly lighter (LRV 39 vs 31), a gap that shows most in low-lit rooms.