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.