#3385BF 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 #3385BF works with other colors. Named schemes with #3385BF 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 #3385BF 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 #3385BF at work across the surfaces designers actually ship.
:root {
--color-base: #3385BF;
--color-base-rgb: 51 133 191;
--color-base-oklch: oklch(59.4% 0.118 243.4);
--color-50: #F2F8FC;
--color-100: #DEEDF7;
--color-200: #BFDAEE;
--color-300: #92BEDD;
--color-400: #69A1C9;
--color-500: #4783AD;
--color-600: #3D6785;
--color-700: #304B5F;
--color-800: #23333E;
--color-900: #172026;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F2F8FC',
100: '#DEEDF7',
200: '#BFDAEE',
300: '#92BEDD',
400: '#69A1C9',
500: '#4783AD',
600: '#3D6785',
700: '#304B5F',
800: '#23333E',
900: '#172026',
},
}
$base: #3385BF; $base-ink: #141310; $base-50: #F2F8FC; $base-100: #DEEDF7; $base-200: #BFDAEE; $base-300: #92BEDD; $base-400: #69A1C9; $base-500: #4783AD; $base-600: #3D6785; $base-700: #304B5F; $base-800: #23333E; $base-900: #172026; $base-hover: #286997; $base-subtle: #C5D9E8;
{
"color": {
"base": {
"value": "#3385BF",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F2F8FC",
"type": "color"
},
"100": {
"value": "#DEEDF7",
"type": "color"
},
"200": {
"value": "#BFDAEE",
"type": "color"
},
"300": {
"value": "#92BEDD",
"type": "color"
},
"400": {
"value": "#69A1C9",
"type": "color"
},
"500": {
"value": "#4783AD",
"type": "color"
},
"600": {
"value": "#3D6785",
"type": "color"
},
"700": {
"value": "#304B5F",
"type": "color"
},
"800": {
"value": "#23333E",
"type": "color"
},
"900": {
"value": "#172026",
"type": "color"
}
}
}
}