Steel Blue 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 Steel Blue works with other colors. Named schemes with Steel Blue 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 Steel Blue 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 Steel Blue at work across the surfaces designers actually ship.
:root {
--color-base: #4682B4;
--color-base-rgb: 70 130 180;
--color-base-oklch: oklch(58.8% 0.099 245.7);
--color-50: #F4F8FB;
--color-100: #E1ECF4;
--color-200: #C4D8E8;
--color-300: #9BBAD4;
--color-400: #759DBD;
--color-500: #547EA1;
--color-600: #46647C;
--color-700: #364959;
--color-800: #26323B;
--color-900: #191F25;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F4F8FB',
100: '#E1ECF4',
200: '#C4D8E8',
300: '#9BBAD4',
400: '#759DBD',
500: '#547EA1',
600: '#46647C',
700: '#364959',
800: '#26323B',
900: '#191F25',
},
}
$base: #4682B4; $base-ink: #141310; $base-50: #F4F8FB; $base-100: #E1ECF4; $base-200: #C4D8E8; $base-300: #9BBAD4; $base-400: #759DBD; $base-500: #547EA1; $base-600: #46647C; $base-700: #364959; $base-800: #26323B; $base-900: #191F25; $base-hover: #386890; $base-subtle: #CBD9E5;
{
"color": {
"base": {
"value": "#4682B4",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F4F8FB",
"type": "color"
},
"100": {
"value": "#E1ECF4",
"type": "color"
},
"200": {
"value": "#C4D8E8",
"type": "color"
},
"300": {
"value": "#9BBAD4",
"type": "color"
},
"400": {
"value": "#759DBD",
"type": "color"
},
"500": {
"value": "#547EA1",
"type": "color"
},
"600": {
"value": "#46647C",
"type": "color"
},
"700": {
"value": "#364959",
"type": "color"
},
"800": {
"value": "#26323B",
"type": "color"
},
"900": {
"value": "#191F25",
"type": "color"
}
}
}
}