#375476 is a mid-toned, cool indigo. On the Color Lab it reads clean and engineered, quietly premium. It carries a legible label as a UI accent and reproduces cleanly in print.
Not just a swatch — here's how #375476 works with other colors. Named schemes with #375476 in its natural role, and a note on why the supporting colors balance it.
Classic Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Classic Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Classic 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 Classic Blue.
Classic 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.
Classic 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 Classic Blue carrying the quiet middle.
How #375476 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 #375476 at work across the surfaces designers actually ship.
:root {
--color-base: #375476;
--color-base-rgb: 55 84 118;
--color-base-oklch: oklch(43.9% 0.066 253.1);
--color-50: #F4F7FA;
--color-100: #E3EAF2;
--color-200: #C8D5E5;
--color-300: #A0B6CF;
--color-400: #7B97B7;
--color-500: #5B789A;
--color-600: #4A5F77;
--color-700: #394656;
--color-800: #283039;
--color-900: #1A1E23;
--color-on-base: #FFFFFF;
}
// tailwind.config.js
colors: {
classic-blue: {
50: '#F4F7FA',
100: '#E3EAF2',
200: '#C8D5E5',
300: '#A0B6CF',
400: '#7B97B7',
500: '#5B789A',
600: '#4A5F77',
700: '#394656',
800: '#283039',
900: '#1A1E23',
},
}
$base: #375476; $base-ink: #FFFFFF; $base-50: #F4F7FA; $base-100: #E3EAF2; $base-200: #C8D5E5; $base-300: #A0B6CF; $base-400: #7B97B7; $base-500: #5B789A; $base-600: #4A5F77; $base-700: #394656; $base-800: #283039; $base-900: #1A1E23; $base-hover: #2C445E; $base-subtle: #BFCCDA;
{
"color": {
"base": {
"value": "#375476",
"type": "color"
},
"onBase": {
"value": "#FFFFFF",
"type": "color"
},
"scale": {
"50": {
"value": "#F4F7FA",
"type": "color"
},
"100": {
"value": "#E3EAF2",
"type": "color"
},
"200": {
"value": "#C8D5E5",
"type": "color"
},
"300": {
"value": "#A0B6CF",
"type": "color"
},
"400": {
"value": "#7B97B7",
"type": "color"
},
"500": {
"value": "#5B789A",
"type": "color"
},
"600": {
"value": "#4A5F77",
"type": "color"
},
"700": {
"value": "#394656",
"type": "color"
},
"800": {
"value": "#283039",
"type": "color"
},
"900": {
"value": "#1A1E23",
"type": "color"
}
}
}
}