Cobble Brown vs Sea Mariner
Both from Sherwin-Williams's palette. Cobble Brown reads as beige-greige, while Sea Mariner reads as blue-grey — two distinct hue families, not close cousins. Cobble Brown (LRV 14) reflects noticeably more light than Sea Mariner (LRV 7), a difference of 7 points that becomes especially apparent in rooms with limited natural light. Cobble Brown runs warm while Sea Mariner is decidedly cool, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 23.7, 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 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cobble Brown vs Sea Mariner in Real Spaces
1 real room side by side. Seeing Cobble Brown and Sea Mariner in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Mudroom
Mudrooms are seen in passing, often under whatever light comes through the door — a context that favors colors with some depth. Cobble Brown has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Cobble Brown vs Sea Mariner Simulated Comparison
5 simulated room previews — drag the slider on each to see Cobble Brown on one side and Sea Mariner 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 Cobble Brown comparisons
See how Cobble Brown stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 14), opening up a space where Cobble Brown encloses it.
At LRV 83 vs 14, White Dove is decisively the brighter choice.
A 8-point LRV gap (14 vs 6) makes Cobble Brown the marginally brighter of the two.
Purbeck Stone reflects far more light (LRV 52 vs 14), opening up a space where Cobble Brown encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 14), opening up a space where Cobble Brown encloses it.
At LRV 52 vs 14, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 14), opening up a space where Cobble Brown encloses it.
At LRV 58 vs 14, Accessible Beige is decisively the brighter choice.
At LRV 27 vs 14, Denim Drift is decisively the brighter choice.
French Gray reflects far more light (LRV 43 vs 14), opening up a space where Cobble Brown encloses it.
Cobble Brown reads slightly lighter (LRV 14 vs 4), a gap that shows most in low-lit rooms.
At LRV 55 vs 14, Tranquil Dawn is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 14 vs 13), so neither reads brighter in a room.
At LRV 44 vs 14, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 14), opening up a space where Cobble Brown encloses it.
Artichoke reads slightly lighter (LRV 21 vs 14), a gap that shows most in low-lit rooms.
At LRV 66 vs 14, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 14, Shoji White is decisively the brighter choice.
At LRV 83 vs 14, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 14), opening up a space where Cobble Brown encloses it.
Their light reflectance is nearly identical (LRV 14 vs 12), so neither reads brighter in a room.
A 6-point LRV gap (14 vs 8) makes Cobble Brown the marginally brighter of the two.
At LRV 68 vs 14, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 14), opening up a space where Cobble Brown encloses it.
Their light reflectance is nearly identical (LRV 14 vs 12), so neither reads brighter in a room.
At LRV 45 vs 14, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 14), opening up a space where Cobble Brown encloses it.