A near-black green that reads like mud and reeds at dusk.
Harbor Slate
#2C5468
rgb(44, 84, 104)
A weathered blue-gray with the dull shine of wet dock pilings.
Tidewater Green
#2F7A63
rgb(47, 122, 99)
The central hue, somewhere between kelp and copper patina.
Channel Mist
#6FA9A6
rgb(111, 169, 166)
A soft blue-green haze like fog sitting over open water.
Shoal Foam
#C9E4D8
rgb(201, 228, 216)
A pale, almost-white green recalling foam skimming over sandbars.
Tidal landscapes rarely hold a single color for long—mud darkens, water lightens, and algae tints everything in between—and this set tries to hold that whole span at once. Marsh Hollow and Harbor Slate sit low and serious, carrying the weight of silt and old rope, while Shoal Foam drifts up near white without losing its green cast. The middle tones do the real work: Tidewater Green and Channel Mist read as neither strictly blue nor strictly green, which gives the whole arrangement a shifting, almost amphibious feel. It's calm but not static, more working wetland than resort postcard.
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The combination reads naturally for anything tied to coastal ecology, marine conservation, or outdoor gear meant for brackish or estuarine environments rather than tropical beaches. A seafood brand or oyster farm could use Marsh Hollow and Harbor Slate for signage and packaging, saving Shoal Foam for interior labels where legibility matters. Wellness or spa branding built around mineral baths and mud treatments would find an honest, slightly grittier alternative here to the usual pastel spa palette. Even a cartography or field-guide project—tide tables, bird-watching maps—could lean on these tones to suggest terrain without resorting to literal illustration.
Keep Marsh Hollow reserved for small, dense areas—text, icons, thin borders—since at large scale it tips from moody into simply dark. Harbor Slate and Tidewater Green carry enough saturation to hold their own as section backgrounds or button fills, and they read well against both Shoal Foam and plain white. Channel Mist works as a quiet divider or hover state, something that shifts attention without demanding it. Pair any two adjacent swatches for subtlety, or stretch from Marsh Hollow to Shoal Foam across a single gradient to suggest depth, the way light fades through a few feet of tidal water.
