#175153 is a mid-toned, cool cyan-blue. On the Color Lab it reads clean and engineered, quietly premium. It reproduces cleanly in print.
Not just a swatch — here's how #175153 works with other colors. Named schemes with #175153 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 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 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 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 #175153 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 #175153 at work across the surfaces designers actually ship.
:root {
--color-base: #175153;
--color-base-rgb: 23 81 83;
--color-base-oklch: oklch(39.9% 0.058 198.4);
--color-50: #F3FCFC;
--color-100: #DEF6F7;
--color-200: #BFECED;
--color-300: #93DADC;
--color-400: #6AC5C8;
--color-500: #48A9AD;
--color-600: #3D8284;
--color-700: #305D5E;
--color-800: #233D3E;
--color-900: #172626;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
dark-slate-gray: {
50: '#F3FCFC',
100: '#DEF6F7',
200: '#BFECED',
300: '#93DADC',
400: '#6AC5C8',
500: '#48A9AD',
600: '#3D8284',
700: '#305D5E',
800: '#233D3E',
900: '#172626',
},
}
$base: #175153; $base-ink: #FFFFFF; $base-50: #F3FCFC; $base-100: #DEF6F7; $base-200: #BFECED; $base-300: #93DADC; $base-400: #6AC5C8; $base-500: #48A9AD; $base-600: #3D8284; $base-700: #305D5E; $base-800: #233D3E; $base-900: #172626; $base-hover: #124243; $base-subtle: #A8DBDD;
{
"color": {
"base": {
"value": "#175153",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F3FCFC",
"type": "color"
},
"100": {
"value": "#DEF6F7",
"type": "color"
},
"200": {
"value": "#BFECED",
"type": "color"
},
"300": {
"value": "#93DADC",
"type": "color"
},
"400": {
"value": "#6AC5C8",
"type": "color"
},
"500": {
"value": "#48A9AD",
"type": "color"
},
"600": {
"value": "#3D8284",
"type": "color"
},
"700": {
"value": "#305D5E",
"type": "color"
},
"800": {
"value": "#233D3E",
"type": "color"
},
"900": {
"value": "#172626",
"type": "color"
}
}
}
}