Sea Mariner vs Thatch Brown
Sea Mariner and Thatch Brown come from the same Sherwin-Williams collection. Hue-wise, Sea Mariner belongs to the blue-grey family and Thatch Brown to the beige-greige family. The 11-point LRV gap — 17 for Thatch Brown vs 7 for Sea Mariner — means Thatch Brown will open up a space more effectively. Where Sea Mariner leans cool, Thatch Brown reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 30.2 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Sea Mariner vs Thatch Brown Simulated Comparison
5 simulated room previews — drag the slider on each to see Sea Mariner on one side and Thatch Brown 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 Sea Mariner comparisons
See how Sea Mariner stacks up against other well-photographed colors across different brands and tones.
