#E4EFF5 is a light neutral with only a whisper of temperate cast. 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 #E4EFF5 works with other colors. Named schemes with #E4EFF5 in its natural role, and a note on why the supporting colors balance it.
Cool White 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.
Cool White opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Cool White is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Cool White.
Cool White keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Cool White 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 Cool White carrying the quiet middle.
How #E4EFF5 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 #E4EFF5 at work across the surfaces designers actually ship.
:root {
--color-base: #E4EFF5;
--color-base-rgb: 228 239 245;
--color-base-oklch: oklch(94.6% 0.014 231.2);
--color-50: #F3F9FB;
--color-100: #E1EEF5;
--color-200: #C4DCE9;
--color-300: #9AC1D5;
--color-400: #73A4BF;
--color-500: #5287A3;
--color-600: #44697E;
--color-700: #354D5A;
--color-800: #25343C;
--color-900: #182025;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
cool-white: {
50: '#F3F9FB',
100: '#E1EEF5',
200: '#C4DCE9',
300: '#9AC1D5',
400: '#73A4BF',
500: '#5287A3',
600: '#44697E',
700: '#354D5A',
800: '#25343C',
900: '#182025',
},
}
$base: #E4EFF5; $base-ink: #141310; $base-50: #F3F9FB; $base-100: #E1EEF5; $base-200: #C4DCE9; $base-300: #9AC1D5; $base-400: #73A4BF; $base-500: #5287A3; $base-600: #44697E; $base-700: #354D5A; $base-800: #25343C; $base-900: #182025; $base-hover: #A0C7DC; $base-subtle: #F8FAFC;
{
"color": {
"base": {
"value": "#E4EFF5",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F9FB",
"type": "color"
},
"100": {
"value": "#E1EEF5",
"type": "color"
},
"200": {
"value": "#C4DCE9",
"type": "color"
},
"300": {
"value": "#9AC1D5",
"type": "color"
},
"400": {
"value": "#73A4BF",
"type": "color"
},
"500": {
"value": "#5287A3",
"type": "color"
},
"600": {
"value": "#44697E",
"type": "color"
},
"700": {
"value": "#354D5A",
"type": "color"
},
"800": {
"value": "#25343C",
"type": "color"
},
"900": {
"value": "#182025",
"type": "color"
}
}
}
}