#3C89AF is a mid-toned, cool blue. On the Color Lab it reads clean and engineered. It carries a legible label as a UI accent and sits well as a supporting tone.
Not just a swatch — here's how #3C89AF works with other colors. Named schemes with #3C89AF in its natural role, and a note on why the supporting colors balance it.
Steel Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Steel Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Steel Blue.
Steel Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Steel Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Steel Blue 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 Steel Blue carrying the quiet middle.
How #3C89AF 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 #3C89AF at work across the surfaces designers actually ship.
:root {
--color-base: #3C89AF;
--color-base-rgb: 60 137 175;
--color-base-oklch: oklch(59.8% 0.095 233.0);
--color-50: #F3F9FB;
--color-100: #E0EEF5;
--color-200: #C2DDEA;
--color-300: #98C2D7;
--color-400: #70A7C2;
--color-500: #4F89A6;
--color-600: #426B7F;
--color-700: #344E5B;
--color-800: #25343C;
--color-900: #182125;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F3F9FB',
100: '#E0EEF5',
200: '#C2DDEA',
300: '#98C2D7',
400: '#70A7C2',
500: '#4F89A6',
600: '#426B7F',
700: '#344E5B',
800: '#25343C',
900: '#182125',
},
}
$base: #3C89AF; $base-ink: #141310; $base-50: #F3F9FB; $base-100: #E0EEF5; $base-200: #C2DDEA; $base-300: #98C2D7; $base-400: #70A7C2; $base-500: #4F89A6; $base-600: #426B7F; $base-700: #344E5B; $base-800: #25343C; $base-900: #182125; $base-hover: #306D8C; $base-subtle: #C6DBE5;
{
"color": {
"base": {
"value": "#3C89AF",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F9FB",
"type": "color"
},
"100": {
"value": "#E0EEF5",
"type": "color"
},
"200": {
"value": "#C2DDEA",
"type": "color"
},
"300": {
"value": "#98C2D7",
"type": "color"
},
"400": {
"value": "#70A7C2",
"type": "color"
},
"500": {
"value": "#4F89A6",
"type": "color"
},
"600": {
"value": "#426B7F",
"type": "color"
},
"700": {
"value": "#344E5B",
"type": "color"
},
"800": {
"value": "#25343C",
"type": "color"
},
"900": {
"value": "#182125",
"type": "color"
}
}
}
}