Cocoon vs Sea Mariner
Both are Sherwin-Williams colors. Hue-wise, Cocoon belongs to the greige-grey family and Sea Mariner to the blue-grey family. At LRV 15 vs 7, Cocoon will read as the brighter of the two — a 8-point gap that matters most in north-facing or low-light rooms. The tonal difference — Cocoon's warm character against Sea Mariner's cool — becomes most visible against white trim or in morning light. At ΔE 22.1, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cocoon vs Sea Mariner in Real Spaces
1 real room side by side. Seeing Cocoon 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
A mudroom color needs to hold up under the most casual scrutiny: a glance as you're coming and going, often in mixed or artificial light. Cocoon reflects noticeably more light off the walls, making the space read more open than Sea Mariner.
Color Details
Cocoon vs Sea Mariner Simulated Comparison
5 simulated room previews — drag the slider on each to see Cocoon 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.