#23839E 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 #23839E works with other colors. Named schemes with #23839E in its natural role, and a note on why the supporting colors balance it.
Dark Cyan opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Dark Cyan is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Dark Cyan.
Dark Cyan plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Dark Cyan sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Dark Cyan 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 Dark Cyan carrying the quiet middle.
How #23839E 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 #23839E at work across the surfaces designers actually ship.
:root {
--color-base: #23839E;
--color-base-rgb: 35 131 158;
--color-base-oklch: oklch(56.8% 0.094 221.4);
--color-50: #F2FAFD;
--color-100: #DDF2F8;
--color-200: #BCE5F0;
--color-300: #8ECFE1;
--color-400: #64B7CE;
--color-500: #429AB3;
--color-600: #397789;
--color-700: #2E5661;
--color-800: #213940;
--color-900: #162427;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
dark-cyan: {
50: '#F2FAFD',
100: '#DDF2F8',
200: '#BCE5F0',
300: '#8ECFE1',
400: '#64B7CE',
500: '#429AB3',
600: '#397789',
700: '#2E5661',
800: '#213940',
900: '#162427',
},
}
$base: #23839E; $base-ink: #141310; $base-50: #F2FAFD; $base-100: #DDF2F8; $base-200: #BCE5F0; $base-300: #8ECFE1; $base-400: #64B7CE; $base-500: #429AB3; $base-600: #397789; $base-700: #2E5661; $base-800: #213940; $base-900: #162427; $base-hover: #1C6A7F; $base-subtle: #B9DDE7;
{
"color": {
"base": {
"value": "#23839E",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F2FAFD",
"type": "color"
},
"100": {
"value": "#DDF2F8",
"type": "color"
},
"200": {
"value": "#BCE5F0",
"type": "color"
},
"300": {
"value": "#8ECFE1",
"type": "color"
},
"400": {
"value": "#64B7CE",
"type": "color"
},
"500": {
"value": "#429AB3",
"type": "color"
},
"600": {
"value": "#397789",
"type": "color"
},
"700": {
"value": "#2E5661",
"type": "color"
},
"800": {
"value": "#213940",
"type": "color"
},
"900": {
"value": "#162427",
"type": "color"
}
}
}
}