#318ABA 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 #318ABA works with other colors. Named schemes with #318ABA 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 #318ABA 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 #318ABA at work across the surfaces designers actually ship.
:root {
--color-base: #318ABA;
--color-base-rgb: 49 138 186;
--color-base-oklch: oklch(60.2% 0.110 236.6);
--color-50: #F2F9FC;
--color-100: #DEEEF7;
--color-200: #BFDDEE;
--color-300: #92C3DD;
--color-400: #69A7C9;
--color-500: #478AAD;
--color-600: #3D6C85;
--color-700: #304E5F;
--color-800: #23353E;
--color-900: #172126;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F2F9FC',
100: '#DEEEF7',
200: '#BFDDEE',
300: '#92C3DD',
400: '#69A7C9',
500: '#478AAD',
600: '#3D6C85',
700: '#304E5F',
800: '#23353E',
900: '#172126',
},
}
$base: #318ABA; $base-ink: #141310; $base-50: #F2F9FC; $base-100: #DEEEF7; $base-200: #BFDDEE; $base-300: #92C3DD; $base-400: #69A7C9; $base-500: #478AAD; $base-600: #3D6C85; $base-700: #304E5F; $base-800: #23353E; $base-900: #172126; $base-hover: #276E94; $base-subtle: #C3DBE8;
{
"color": {
"base": {
"value": "#318ABA",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F2F9FC",
"type": "color"
},
"100": {
"value": "#DEEEF7",
"type": "color"
},
"200": {
"value": "#BFDDEE",
"type": "color"
},
"300": {
"value": "#92C3DD",
"type": "color"
},
"400": {
"value": "#69A7C9",
"type": "color"
},
"500": {
"value": "#478AAD",
"type": "color"
},
"600": {
"value": "#3D6C85",
"type": "color"
},
"700": {
"value": "#304E5F",
"type": "color"
},
"800": {
"value": "#23353E",
"type": "color"
},
"900": {
"value": "#172126",
"type": "color"
}
}
}
}