#E4EFF8 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 #E4EFF8 works with other colors. Named schemes with #E4EFF8 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 #E4EFF8 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 #E4EFF8 at work across the surfaces designers actually ship.
:root {
--color-base: #E4EFF8;
--color-base-rgb: 228 239 248;
--color-base-oklch: oklch(94.7% 0.017 242.4);
--color-50: #F2F8FC;
--color-100: #DEECF7;
--color-200: #BED9EE;
--color-300: #92BBDE;
--color-400: #689ECA;
--color-500: #4680AE;
--color-600: #3C6586;
--color-700: #304A5F;
--color-800: #22323F;
--color-900: #171F27;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
cool-white: {
50: '#F2F8FC',
100: '#DEECF7',
200: '#BED9EE',
300: '#92BBDE',
400: '#689ECA',
500: '#4680AE',
600: '#3C6586',
700: '#304A5F',
800: '#22323F',
900: '#171F27',
},
}
$base: #E4EFF8; $base-ink: #141310; $base-50: #F2F8FC; $base-100: #DEECF7; $base-200: #BED9EE; $base-300: #92BBDE; $base-400: #689ECA; $base-500: #4680AE; $base-600: #3C6586; $base-700: #304A5F; $base-800: #22323F; $base-900: #171F27; $base-hover: #97C2E4; $base-subtle: #F7FAFC;
{
"color": {
"base": {
"value": "#E4EFF8",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F2F8FC",
"type": "color"
},
"100": {
"value": "#DEECF7",
"type": "color"
},
"200": {
"value": "#BED9EE",
"type": "color"
},
"300": {
"value": "#92BBDE",
"type": "color"
},
"400": {
"value": "#689ECA",
"type": "color"
},
"500": {
"value": "#4680AE",
"type": "color"
},
"600": {
"value": "#3C6586",
"type": "color"
},
"700": {
"value": "#304A5F",
"type": "color"
},
"800": {
"value": "#22323F",
"type": "color"
},
"900": {
"value": "#171F27",
"type": "color"
}
}
}
}