#EFF1FC 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 #EFF1FC works with other colors. Named schemes with #EFF1FC 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 #EFF1FC 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 #EFF1FC at work across the surfaces designers actually ship.
:root {
--color-base: #EFF1FC;
--color-base-rgb: 239 241 252;
--color-base-oklch: oklch(96.0% 0.015 277.9);
--color-50: #F2F3FD;
--color-100: #DCE0F9;
--color-200: #BBC3F2;
--color-300: #8C99E3;
--color-400: #6172D1;
--color-500: #3F50B6;
--color-600: #37438B;
--color-700: #2C3463;
--color-800: #202541;
--color-900: #151828;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
cool-white: {
50: '#F2F3FD',
100: '#DCE0F9',
200: '#BBC3F2',
300: '#8C99E3',
400: '#6172D1',
500: '#3F50B6',
600: '#37438B',
700: '#2C3463',
800: '#202541',
900: '#151828',
},
}
$base: #EFF1FC; $base-ink: #141310; $base-50: #F2F3FD; $base-100: #DCE0F9; $base-200: #BBC3F2; $base-300: #8C99E3; $base-400: #6172D1; $base-500: #3F50B6; $base-600: #37438B; $base-700: #2C3463; $base-800: #202541; $base-900: #151828; $base-hover: #9CA8EC; $base-subtle: #FAFBFE;
{
"color": {
"base": {
"value": "#EFF1FC",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F2F3FD",
"type": "color"
},
"100": {
"value": "#DCE0F9",
"type": "color"
},
"200": {
"value": "#BBC3F2",
"type": "color"
},
"300": {
"value": "#8C99E3",
"type": "color"
},
"400": {
"value": "#6172D1",
"type": "color"
},
"500": {
"value": "#3F50B6",
"type": "color"
},
"600": {
"value": "#37438B",
"type": "color"
},
"700": {
"value": "#2C3463",
"type": "color"
},
"800": {
"value": "#202541",
"type": "color"
},
"900": {
"value": "#151828",
"type": "color"
}
}
}
}