#558196 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 #558196 works with other colors. Named schemes with #558196 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 #558196 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 #558196 at work across the surfaces designers actually ship.
:root {
--color-base: #558196;
--color-base-rgb: 85 129 150;
--color-base-oklch: oklch(57.9% 0.058 229.6);
--color-50: #F5F8FA;
--color-100: #E5EDF1;
--color-200: #CBDAE2;
--color-300: #A6BECA;
--color-400: #82A1B0;
--color-500: #628393;
--color-600: #4F6772;
--color-700: #3C4C53;
--color-800: #2A3337;
--color-900: #1B2022;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
slate-gray: {
50: '#F5F8FA',
100: '#E5EDF1',
200: '#CBDAE2',
300: '#A6BECA',
400: '#82A1B0',
500: '#628393',
600: '#4F6772',
700: '#3C4C53',
800: '#2A3337',
900: '#1B2022',
},
}
$base: #558196; $base-ink: #141310; $base-50: #F5F8FA; $base-100: #E5EDF1; $base-200: #CBDAE2; $base-300: #A6BECA; $base-400: #82A1B0; $base-500: #628393; $base-600: #4F6772; $base-700: #3C4C53; $base-800: #2A3337; $base-900: #1B2022; $base-hover: #446778; $base-subtle: #CDD9DE;
{
"color": {
"base": {
"value": "#558196",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F5F8FA",
"type": "color"
},
"100": {
"value": "#E5EDF1",
"type": "color"
},
"200": {
"value": "#CBDAE2",
"type": "color"
},
"300": {
"value": "#A6BECA",
"type": "color"
},
"400": {
"value": "#82A1B0",
"type": "color"
},
"500": {
"value": "#628393",
"type": "color"
},
"600": {
"value": "#4F6772",
"type": "color"
},
"700": {
"value": "#3C4C53",
"type": "color"
},
"800": {
"value": "#2A3337",
"type": "color"
},
"900": {
"value": "#1B2022",
"type": "color"
}
}
}
}