#417BB5 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 #417BB5 works with other colors. Named schemes with #417BB5 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 #417BB5 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 #417BB5 at work across the surfaces designers actually ship.
:root {
--color-base: #417BB5;
--color-base-rgb: 65 123 181;
--color-base-oklch: oklch(57.0% 0.109 250.3);
--color-50: #F3F7FB;
--color-100: #E0EBF5;
--color-200: #C3D6E9;
--color-300: #99B8D6;
--color-400: #7299C0;
--color-500: #517AA4;
--color-600: #44617E;
--color-700: #34475A;
--color-800: #25303C;
--color-900: #181F25;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F3F7FB',
100: '#E0EBF5',
200: '#C3D6E9',
300: '#99B8D6',
400: '#7299C0',
500: '#517AA4',
600: '#44617E',
700: '#34475A',
800: '#25303C',
900: '#181F25',
},
}
$base: #417BB5; $base-ink: #141310; $base-50: #F3F7FB; $base-100: #E0EBF5; $base-200: #C3D6E9; $base-300: #99B8D6; $base-400: #7299C0; $base-500: #517AA4; $base-600: #44617E; $base-700: #34475A; $base-800: #25303C; $base-900: #181F25; $base-hover: #346290; $base-subtle: #C9D7E5;
{
"color": {
"base": {
"value": "#417BB5",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F7FB",
"type": "color"
},
"100": {
"value": "#E0EBF5",
"type": "color"
},
"200": {
"value": "#C3D6E9",
"type": "color"
},
"300": {
"value": "#99B8D6",
"type": "color"
},
"400": {
"value": "#7299C0",
"type": "color"
},
"500": {
"value": "#517AA4",
"type": "color"
},
"600": {
"value": "#44617E",
"type": "color"
},
"700": {
"value": "#34475A",
"type": "color"
},
"800": {
"value": "#25303C",
"type": "color"
},
"900": {
"value": "#181F25",
"type": "color"
}
}
}
}