Tranquil Dawn vs Sea Mariner
Tranquil Dawn is a Dulux color while Sea Mariner comes from Sherwin-Williams. Hue-wise, Tranquil Dawn belongs to the green-grey family and Sea Mariner to the blue-grey family. At LRV 55 vs 7, Tranquil Dawn will read as the brighter of the two — a 48-point gap that matters most in north-facing or low-light rooms. The tonal difference — Tranquil Dawn's neutral character against Sea Mariner's cool — becomes most visible against white trim or in morning light. At ΔE 48.3, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Tranquil Dawn vs Sea Mariner in Real Spaces
2 real rooms side by side. Seeing Tranquil Dawn 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. Tranquil Dawn reflects noticeably more light off the walls, making the space read more open than Sea Mariner.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The LRV gap is large enough that Tranquil Dawn will make the room feel meaningfully brighter than Sea Mariner would.
Color Details
Tranquil Dawn vs Sea Mariner Simulated Comparison
5 simulated room previews — drag the slider on each to see Tranquil Dawn 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.
More Tranquil Dawn comparisons
See how Tranquil Dawn stacks up against other well-photographed colors across different brands and tones.
