#588690 is a mid-toned, cool 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 #588690 works with other colors. Named schemes with #588690 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 #588690 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 #588690 at work across the surfaces designers actually ship.
:root {
--color-base: #588690;
--color-base-rgb: 88 134 144;
--color-base-oklch: oklch(59.1% 0.052 212.8);
--color-50: #F5F9F9;
--color-100: #E5EEF0;
--color-200: #CCDCE0;
--color-300: #A8C1C7;
--color-400: #85A6AD;
--color-500: #658890;
--color-600: #526A70;
--color-700: #3E4E51;
--color-800: #2B3436;
--color-900: #1B2122;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
slate-gray: {
50: '#F5F9F9',
100: '#E5EEF0',
200: '#CCDCE0',
300: '#A8C1C7',
400: '#85A6AD',
500: '#658890',
600: '#526A70',
700: '#3E4E51',
800: '#2B3436',
900: '#1B2122',
},
}
$base: #588690; $base-ink: #141310; $base-50: #F5F9F9; $base-100: #E5EEF0; $base-200: #CCDCE0; $base-300: #A8C1C7; $base-400: #85A6AD; $base-500: #658890; $base-600: #526A70; $base-700: #3E4E51; $base-800: #2B3436; $base-900: #1B2122; $base-hover: #466A72; $base-subtle: #CDDADD;
{
"color": {
"base": {
"value": "#588690",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F5F9F9",
"type": "color"
},
"100": {
"value": "#E5EEF0",
"type": "color"
},
"200": {
"value": "#CCDCE0",
"type": "color"
},
"300": {
"value": "#A8C1C7",
"type": "color"
},
"400": {
"value": "#85A6AD",
"type": "color"
},
"500": {
"value": "#658890",
"type": "color"
},
"600": {
"value": "#526A70",
"type": "color"
},
"700": {
"value": "#3E4E51",
"type": "color"
},
"800": {
"value": "#2B3436",
"type": "color"
},
"900": {
"value": "#1B2122",
"type": "color"
}
}
}
}