#278554 is a mid-toned, cool teal-green. On the Color Lab it reads organic and grounded, with a faded, vintage edge. It carries a legible label as a UI accent and sits well as a supporting tone.
Not just a swatch — here's how #278554 works with other colors. Named schemes with #278554 in its natural role, and a note on why the supporting colors balance it.
Sea Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.
Sea Green opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Sea Green plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Sea Green sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Sea Green is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Sea Green carrying the quiet middle.
How #278554 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.
Not a swatch to memorise — a color to build with. Here is #278554 at work across the surfaces designers actually ship.
:root {
--color-base: #278554;
--color-base-rgb: 39 133 84;
--color-base-oklch: oklch(55.0% 0.116 156.1);
--color-50: #F3FCF7;
--color-100: #DFF6EA;
--color-200: #C0EDD5;
--color-300: #94DBB6;
--color-400: #6BC797;
--color-500: #4AAB79;
--color-600: #3F8360;
--color-700: #315E47;
--color-800: #233E30;
--color-900: #17261E;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
sea-green: {
50: '#F3FCF7',
100: '#DFF6EA',
200: '#C0EDD5',
300: '#94DBB6',
400: '#6BC797',
500: '#4AAB79',
600: '#3F8360',
700: '#315E47',
800: '#233E30',
900: '#17261E',
},
}
$base: #278554; $base-ink: #FFFFFF; $base-50: #F3FCF7; $base-100: #DFF6EA; $base-200: #C0EDD5; $base-300: #94DBB6; $base-400: #6BC797; $base-500: #4AAB79; $base-600: #3F8360; $base-700: #315E47; $base-800: #233E30; $base-900: #17261E; $base-hover: #1F6C44; $base-subtle: #B7E2CC;
{
"color": {
"base": {
"value": "#278554",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F3FCF7",
"type": "color"
},
"100": {
"value": "#DFF6EA",
"type": "color"
},
"200": {
"value": "#C0EDD5",
"type": "color"
},
"300": {
"value": "#94DBB6",
"type": "color"
},
"400": {
"value": "#6BC797",
"type": "color"
},
"500": {
"value": "#4AAB79",
"type": "color"
},
"600": {
"value": "#3F8360",
"type": "color"
},
"700": {
"value": "#315E47",
"type": "color"
},
"800": {
"value": "#233E30",
"type": "color"
},
"900": {
"value": "#17261E",
"type": "color"
}
}
}
}