#5281CB is a mid-toned, cool indigo. 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 #5281CB works with other colors. Named schemes with #5281CB in its natural role, and a note on why the supporting colors balance it.
Glaucous opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Glaucous is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Glaucous.
Glaucous plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Glaucous sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Glaucous 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 Glaucous carrying the quiet middle.
How #5281CB 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 #5281CB at work across the surfaces designers actually ship.
:root {
--color-base: #5281CB;
--color-base-rgb: 82 129 203;
--color-base-oklch: oklch(60.4% 0.125 259.1);
--color-50: #F3F6FC;
--color-100: #DFE8F6;
--color-200: #C0D1EC;
--color-300: #95AFDA;
--color-400: #6C8FC6;
--color-500: #4B6FAA;
--color-600: #3F5983;
--color-700: #32425D;
--color-800: #232D3D;
--color-900: #171D26;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
glaucous: {
50: '#F3F6FC',
100: '#DFE8F6',
200: '#C0D1EC',
300: '#95AFDA',
400: '#6C8FC6',
500: '#4B6FAA',
600: '#3F5983',
700: '#32425D',
800: '#232D3D',
900: '#171D26',
},
}
$base: #5281CB; $base-ink: #141310; $base-50: #F3F6FC; $base-100: #DFE8F6; $base-200: #C0D1EC; $base-300: #95AFDA; $base-400: #6C8FC6; $base-500: #4B6FAA; $base-600: #3F5983; $base-700: #32425D; $base-800: #232D3D; $base-900: #171D26; $base-hover: #3564B0; $base-subtle: #D0DAEB;
{
"color": {
"base": {
"value": "#5281CB",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F6FC",
"type": "color"
},
"100": {
"value": "#DFE8F6",
"type": "color"
},
"200": {
"value": "#C0D1EC",
"type": "color"
},
"300": {
"value": "#95AFDA",
"type": "color"
},
"400": {
"value": "#6C8FC6",
"type": "color"
},
"500": {
"value": "#4B6FAA",
"type": "color"
},
"600": {
"value": "#3F5983",
"type": "color"
},
"700": {
"value": "#32425D",
"type": "color"
},
"800": {
"value": "#232D3D",
"type": "color"
},
"900": {
"value": "#171D26",
"type": "color"
}
}
}
}