#2F75B1 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 #2F75B1 works with other colors. Named schemes with #2F75B1 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 #2F75B1 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 #2F75B1 at work across the surfaces designers actually ship.
:root {
--color-base: #2F75B1;
--color-base-rgb: 47 117 177;
--color-base-oklch: oklch(54.7% 0.117 247.8);
--color-50: #F2F8FC;
--color-100: #DEEBF7;
--color-200: #BFD8EE;
--color-300: #92BADD;
--color-400: #699CC9;
--color-500: #477EAD;
--color-600: #3D6385;
--color-700: #30495F;
--color-800: #23313E;
--color-900: #171F26;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F2F8FC',
100: '#DEEBF7',
200: '#BFD8EE',
300: '#92BADD',
400: '#699CC9',
500: '#477EAD',
600: '#3D6385',
700: '#30495F',
800: '#23313E',
900: '#171F26',
},
}
$base: #2F75B1; $base-ink: #FFFFFF; $base-50: #F2F8FC; $base-100: #DEEBF7; $base-200: #BFD8EE; $base-300: #92BADD; $base-400: #699CC9; $base-500: #477EAD; $base-600: #3D6385; $base-700: #30495F; $base-800: #23313E; $base-900: #171F26; $base-hover: #265D8E; $base-subtle: #C1D5E7;
{
"color": {
"base": {
"value": "#2F75B1",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F2F8FC",
"type": "color"
},
"100": {
"value": "#DEEBF7",
"type": "color"
},
"200": {
"value": "#BFD8EE",
"type": "color"
},
"300": {
"value": "#92BADD",
"type": "color"
},
"400": {
"value": "#699CC9",
"type": "color"
},
"500": {
"value": "#477EAD",
"type": "color"
},
"600": {
"value": "#3D6385",
"type": "color"
},
"700": {
"value": "#30495F",
"type": "color"
},
"800": {
"value": "#23313E",
"type": "color"
},
"900": {
"value": "#171F26",
"type": "color"
}
}
}
}