Sea Mariner vs Summit Gray
Sea Mariner and Summit Gray come from the same Sherwin-Williams collection. Hue-wise, Sea Mariner belongs to the blue-grey family and Summit Gray to the grey family. The 23-point LRV gap — 30 for Summit Gray vs 7 for Sea Mariner — means Summit Gray will open up a space more effectively. Where Sea Mariner leans cool, Summit Gray reads neutral — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 31.3 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Sea Mariner vs Summit Gray in Real Spaces
1 real room side by side. Seeing Sea Mariner and Summit Gray in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Summit Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Sea Mariner vs Summit Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Sea Mariner on one side and Summit Gray 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.
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.
With LRVs of 7 and 4, the two reflect almost the same amount of light.
Pure White reflects far more light (LRV 84 vs 7), opening up a space where Sea Mariner encloses it.
At LRV 74 vs 7, Shoji White is decisively the brighter choice.
At LRV 83 vs 7, Snowbound is decisively the brighter choice.