#588489 is a muted, cool cyan-blue. On the Color Lab it reads clean and engineered, restrained and easy to live with. It carries a legible label as a UI accent and reproduces cleanly in print.
Not just a swatch — here's how #588489 works with other colors. Named schemes with #588489 in its natural role, and a note on why the supporting colors balance it.
Slate Gray opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Slate Gray keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Slate Gray is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Slate Gray.
Slate Gray plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Slate Gray 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 Slate Gray carrying the quiet middle.
How #588489 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 #588489 at work across the surfaces designers actually ship.
:root {
--color-base: #588489;
--color-base-rgb: 88 132 137;
--color-base-oklch: oklch(58.3% 0.049 204.9);
--color-50: #F6F9F9;
--color-100: #E6EEEF;
--color-200: #CDDDDF;
--color-300: #A9C3C6;
--color-400: #87A8AB;
--color-500: #678A8E;
--color-600: #536C6F;
--color-700: #3F4F50;
--color-800: #2B3536;
--color-900: #1C2122;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
slate-gray: {
50: '#F6F9F9',
100: '#E6EEEF',
200: '#CDDDDF',
300: '#A9C3C6',
400: '#87A8AB',
500: '#678A8E',
600: '#536C6F',
700: '#3F4F50',
800: '#2B3536',
900: '#1C2122',
},
}
$base: #588489; $base-ink: #141310; $base-50: #F6F9F9; $base-100: #E6EEEF; $base-200: #CDDDDF; $base-300: #A9C3C6; $base-400: #87A8AB; $base-500: #678A8E; $base-600: #536C6F; $base-700: #3F4F50; $base-800: #2B3536; $base-900: #1C2122; $base-hover: #466A6E; $base-subtle: #CDDADB;
{
"color": {
"base": {
"value": "#588489",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F6F9F9",
"type": "color"
},
"100": {
"value": "#E6EEEF",
"type": "color"
},
"200": {
"value": "#CDDDDF",
"type": "color"
},
"300": {
"value": "#A9C3C6",
"type": "color"
},
"400": {
"value": "#87A8AB",
"type": "color"
},
"500": {
"value": "#678A8E",
"type": "color"
},
"600": {
"value": "#536C6F",
"type": "color"
},
"700": {
"value": "#3F4F50",
"type": "color"
},
"800": {
"value": "#2B3536",
"type": "color"
},
"900": {
"value": "#1C2122",
"type": "color"
}
}
}
}