#375058 is a muted, cool blue. On the Color Lab it reads clean and engineered, quietly premium. It reproduces cleanly in print.
Not just a swatch — here's how #375058 works with other colors. Named schemes with #375058 in its natural role, and a note on why the supporting colors balance it.
Dark Slate Gray opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Dark Slate Gray keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Dark 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 Dark Slate Gray.
Dark 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.
Dark 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 Dark Slate Gray carrying the quiet middle.
How #375058 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 #375058 at work across the surfaces designers actually ship.
:root {
--color-base: #375058;
--color-base-rgb: 55 80 88;
--color-base-oklch: oklch(41.4% 0.033 219.7);
--color-50: #F5F8F9;
--color-100: #E6EDF0;
--color-200: #CDDBE0;
--color-300: #A9BFC6;
--color-400: #86A3AC;
--color-500: #66858F;
--color-600: #53686F;
--color-700: #3E4C51;
--color-800: #2B3336;
--color-900: #1B2022;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
dark-slate-gray: {
50: '#F5F8F9',
100: '#E6EDF0',
200: '#CDDBE0',
300: '#A9BFC6',
400: '#86A3AC',
500: '#66858F',
600: '#53686F',
700: '#3E4C51',
800: '#2B3336',
900: '#1B2022',
},
}
$base: #375058; $base-ink: #FFFFFF; $base-50: #F5F8F9; $base-100: #E6EDF0; $base-200: #CDDBE0; $base-300: #A9BFC6; $base-400: #86A3AC; $base-500: #66858F; $base-600: #53686F; $base-700: #3E4C51; $base-800: #2B3336; $base-900: #1B2022; $base-hover: #2C4046; $base-subtle: #BECDD2;
{
"color": {
"base": {
"value": "#375058",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F5F8F9",
"type": "color"
},
"100": {
"value": "#E6EDF0",
"type": "color"
},
"200": {
"value": "#CDDBE0",
"type": "color"
},
"300": {
"value": "#A9BFC6",
"type": "color"
},
"400": {
"value": "#86A3AC",
"type": "color"
},
"500": {
"value": "#66858F",
"type": "color"
},
"600": {
"value": "#53686F",
"type": "color"
},
"700": {
"value": "#3E4C51",
"type": "color"
},
"800": {
"value": "#2B3336",
"type": "color"
},
"900": {
"value": "#1B2022",
"type": "color"
}
}
}
}