#175F72 is a mid-toned, cool blue. On the Color Lab it reads clean and engineered, quietly premium. It carries a legible label as a UI accent and reproduces cleanly in print.
Not just a swatch — here's how #175F72 works with other colors. Named schemes with #175F72 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 #175F72 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 #175F72 at work across the surfaces designers actually ship.
:root {
--color-base: #175F72;
--color-base-rgb: 23 95 114;
--color-base-oklch: oklch(45.2% 0.074 219.9);
--color-50: #F2FAFD;
--color-100: #DCF3F9;
--color-200: #BBE5F1;
--color-300: #8DD0E2;
--color-400: #62B8D0;
--color-500: #409BB5;
--color-600: #38788A;
--color-700: #2D5662;
--color-800: #213940;
--color-900: #162428;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
dark-slate-gray: {
50: '#F2FAFD',
100: '#DCF3F9',
200: '#BBE5F1',
300: '#8DD0E2',
400: '#62B8D0',
500: '#409BB5',
600: '#38788A',
700: '#2D5662',
800: '#213940',
900: '#162428',
},
}
$base: #175F72; $base-ink: #FFFFFF; $base-50: #F2FAFD; $base-100: #DCF3F9; $base-200: #BBE5F1; $base-300: #8DD0E2; $base-400: #62B8D0; $base-500: #409BB5; $base-600: #38788A; $base-700: #2D5662; $base-800: #213940; $base-900: #162428; $base-hover: #134C5B; $base-subtle: #ABD7E3;
{
"color": {
"base": {
"value": "#175F72",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F2FAFD",
"type": "color"
},
"100": {
"value": "#DCF3F9",
"type": "color"
},
"200": {
"value": "#BBE5F1",
"type": "color"
},
"300": {
"value": "#8DD0E2",
"type": "color"
},
"400": {
"value": "#62B8D0",
"type": "color"
},
"500": {
"value": "#409BB5",
"type": "color"
},
"600": {
"value": "#38788A",
"type": "color"
},
"700": {
"value": "#2D5662",
"type": "color"
},
"800": {
"value": "#213940",
"type": "color"
},
"900": {
"value": "#162428",
"type": "color"
}
}
}
}