#3C7EC1 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 #3C7EC1 works with other colors. Named schemes with #3C7EC1 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 #3C7EC1 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 #3C7EC1 at work across the surfaces designers actually ship.
:root {
--color-base: #3C7EC1;
--color-base-rgb: 60 126 193;
--color-base-oklch: oklch(58.2% 0.123 251.1);
--color-50: #F3F7FC;
--color-100: #DFEBF6;
--color-200: #C1D6EC;
--color-300: #95B8DA;
--color-400: #6D99C5;
--color-500: #4C7AA9;
--color-600: #406182;
--color-700: #32475D;
--color-800: #24303D;
--color-900: #171F26;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
steel-blue: {
50: '#F3F7FC',
100: '#DFEBF6',
200: '#C1D6EC',
300: '#95B8DA',
400: '#6D99C5',
500: '#4C7AA9',
600: '#406182',
700: '#32475D',
800: '#24303D',
900: '#171F26',
},
}
$base: #3C7EC1; $base-ink: #141310; $base-50: #F3F7FC; $base-100: #DFEBF6; $base-200: #C1D6EC; $base-300: #95B8DA; $base-400: #6D99C5; $base-500: #4C7AA9; $base-600: #406182; $base-700: #32475D; $base-800: #24303D; $base-900: #171F26; $base-hover: #30669C; $base-subtle: #C9D9E8;
{
"color": {
"base": {
"value": "#3C7EC1",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F7FC",
"type": "color"
},
"100": {
"value": "#DFEBF6",
"type": "color"
},
"200": {
"value": "#C1D6EC",
"type": "color"
},
"300": {
"value": "#95B8DA",
"type": "color"
},
"400": {
"value": "#6D99C5",
"type": "color"
},
"500": {
"value": "#4C7AA9",
"type": "color"
},
"600": {
"value": "#406182",
"type": "color"
},
"700": {
"value": "#32475D",
"type": "color"
},
"800": {
"value": "#24303D",
"type": "color"
},
"900": {
"value": "#171F26",
"type": "color"
}
}
}
}