#99B1CE is a muted, cool indigo. On the Color Lab it reads clean and engineered, restrained and easy to live with. It holds up as a large surface and is too pale to lead as a primary accent.
Not just a swatch — here's how #99B1CE works with other colors. Named schemes with #99B1CE in its natural role, and a note on why the supporting colors balance it.
Cadet Grey keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Cadet Grey opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Cadet Grey sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.
Cadet Grey is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Cadet Grey.
Cadet Grey 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 Cadet Grey carrying the quiet middle.
How #99B1CE 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 #99B1CE at work across the surfaces designers actually ship.
:root {
--color-base: #99B1CE;
--color-base-rgb: 153 177 206;
--color-base-oklch: oklch(75.2% 0.050 253.3);
--color-50: #F4F7FA;
--color-100: #E3EAF2;
--color-200: #C8D5E4;
--color-300: #A1B5CE;
--color-400: #7C96B6;
--color-500: #5C7799;
--color-600: #4B5F77;
--color-700: #394656;
--color-800: #283039;
--color-900: #1A1E23;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
cadet-grey: {
50: '#F4F7FA',
100: '#E3EAF2',
200: '#C8D5E4',
300: '#A1B5CE',
400: '#7C96B6',
500: '#5C7799',
600: '#4B5F77',
700: '#394656',
800: '#283039',
900: '#1A1E23',
},
}
$base: #99B1CE; $base-ink: #141310; $base-50: #F4F7FA; $base-100: #E3EAF2; $base-200: #C8D5E4; $base-300: #A1B5CE; $base-400: #7C96B6; $base-500: #5C7799; $base-600: #4B5F77; $base-700: #394656; $base-800: #283039; $base-900: #1A1E23; $base-hover: #688BB6; $base-subtle: #E2E7EE;
{
"color": {
"base": {
"value": "#99B1CE",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F4F7FA",
"type": "color"
},
"100": {
"value": "#E3EAF2",
"type": "color"
},
"200": {
"value": "#C8D5E4",
"type": "color"
},
"300": {
"value": "#A1B5CE",
"type": "color"
},
"400": {
"value": "#7C96B6",
"type": "color"
},
"500": {
"value": "#5C7799",
"type": "color"
},
"600": {
"value": "#4B5F77",
"type": "color"
},
"700": {
"value": "#394656",
"type": "color"
},
"800": {
"value": "#283039",
"type": "color"
},
"900": {
"value": "#1A1E23",
"type": "color"
}
}
}
}