Sea Mariner vs Sea Serpent
Sea Mariner and Sea Serpent come from the same Sherwin-Williams collection. Hue-wise, Sea Mariner belongs to the blue-grey family and Sea Serpent to the blue family. Their light reflectance values are nearly the same — 7 vs 7 — so neither will read significantly brighter or darker than the other. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 2.5 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Sea Mariner vs Sea Serpent in Real Spaces
2 real rooms side by side. Sea Mariner and Sea Serpent are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Mudroom
In a hardworking space like a mudroom, the depth and warmth of a color reads differently than in a quieter room. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Color Details
Sea Mariner vs Sea Serpent Simulated Comparison
5 simulated room previews — drag the slider on each to see Sea Mariner on one side and Sea Serpent 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.
At LRV 83 vs 7, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 7), opening up a space where Sea Mariner encloses it.
Their light reflectance is nearly identical (LRV 7 vs 6), so neither reads brighter in a room.
Purbeck Stone reflects far more light (LRV 52 vs 7), opening up a space where Sea Mariner encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 7), opening up a space where Sea Mariner encloses it.
At LRV 52 vs 7, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 7), opening up a space where Sea Mariner encloses it.
At LRV 58 vs 7, Accessible Beige is decisively the brighter choice.
At LRV 27 vs 7, Denim Drift is decisively the brighter choice.
French Gray reflects far more light (LRV 43 vs 7), opening up a space where Sea Mariner encloses it.
With LRVs of 7 and 4, the two reflect almost the same amount of light.
At LRV 55 vs 7, Tranquil Dawn is decisively the brighter choice.
A 7-point LRV gap (13 vs 7) makes Bancha the marginally brighter of the two.
At LRV 44 vs 7, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 7), opening up a space where Sea Mariner encloses it.
Artichoke reflects far more light (LRV 21 vs 7), opening up a space where Sea Mariner encloses it.
At LRV 66 vs 7, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 7, Shoji White is decisively the brighter choice.
At LRV 83 vs 7, Snowbound is decisively the brighter choice.
A 5-point LRV gap (12 vs 7) makes Pewter Green the marginally brighter of the two.
At LRV 68 vs 7, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 7), opening up a space where Sea Mariner encloses it.
Calamine reflects far more light (LRV 68 vs 7), opening up a space where Sea Mariner encloses it.
Treron reflects far more light (LRV 25 vs 7), opening up a space where Sea Mariner encloses it.
A 5-point LRV gap (12 vs 7) makes Vintage Vogue the marginally brighter of the two.
At LRV 45 vs 7, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 7), opening up a space where Sea Mariner encloses it.
With LRVs of 7 and 7, the two reflect almost the same amount of light.
Cement grey reflects far more light (LRV 24 vs 7), opening up a space where Sea Mariner encloses it.
Guilford Green reflects far more light (LRV 57 vs 7), opening up a space where Sea Mariner encloses it.