#178E82 is a mid-toned, cool cyan. On the Color Lab it reads 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 #178E82 works with other colors. Named schemes with #178E82 in its natural role, and a note on why the supporting colors balance it.
Dark Cyan opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Dark Cyan plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Dark Cyan anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.
Dark Cyan sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Dark Cyan 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 Dark Cyan carrying the quiet middle.
How #178E82 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 #178E82 at work across the surfaces designers actually ship.
:root {
--color-base: #178E82;
--color-base-rgb: 23 142 130;
--color-base-oklch: oklch(58.3% 0.099 184.1);
--color-50: #F1FDFC;
--color-100: #DBFAF7;
--color-200: #B9F3EE;
--color-300: #89E6DD;
--color-400: #5DD5C9;
--color-500: #3BBAAD;
--color-600: #348E85;
--color-700: #2A645F;
--color-800: #1F423E;
--color-900: #152826;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
dark-cyan: {
50: '#F1FDFC',
100: '#DBFAF7',
200: '#B9F3EE',
300: '#89E6DD',
400: '#5DD5C9',
500: '#3BBAAD',
600: '#348E85',
700: '#2A645F',
800: '#1F423E',
900: '#152826',
},
}
$base: #178E82; $base-ink: #141310; $base-50: #F1FDFC; $base-100: #DBFAF7; $base-200: #B9F3EE; $base-300: #89E6DD; $base-400: #5DD5C9; $base-500: #3BBAAD; $base-600: #348E85; $base-700: #2A645F; $base-800: #1F423E; $base-900: #152826; $base-hover: #127067; $base-subtle: #AFE7E2;
{
"color": {
"base": {
"value": "#178E82",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F1FDFC",
"type": "color"
},
"100": {
"value": "#DBFAF7",
"type": "color"
},
"200": {
"value": "#B9F3EE",
"type": "color"
},
"300": {
"value": "#89E6DD",
"type": "color"
},
"400": {
"value": "#5DD5C9",
"type": "color"
},
"500": {
"value": "#3BBAAD",
"type": "color"
},
"600": {
"value": "#348E85",
"type": "color"
},
"700": {
"value": "#2A645F",
"type": "color"
},
"800": {
"value": "#1F423E",
"type": "color"
},
"900": {
"value": "#152826",
"type": "color"
}
}
}
}