What color is #EFF1F9?

#EFF1F9 is a pale low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(239, 241, 249), and in HSL hsl(228, 45%, 96%).

Is #EFF1F9 accessible as text?

On white, #EFF1F9 has a contrast ratio of 1.13:1 (fails WCAG AA for body text); on black it is 18.62:1 (passes). For text placed on #EFF1F9, use black for the best readability.

What is the closest Tailwind color to #EFF1F9?

The nearest Tailwind CSS token is slate-100 (#F1F5F9).

What colors go well with #EFF1F9?

As a neutral, #EFF1F9 pairs cleanly with charcoal, near-black and dark grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a soft background and let the accent carry the color.

Is #EFF1F9 the same as CSS whitesmoke?

No — #EFF1F9 is not the CSS named color whitesmoke, but whitesmoke (#F5F5F5) is the closest CSS named color.

#EFF1F9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #EFF1F9

Not just a swatch — here's how #EFF1F9 works with other colors. Named schemes with #EFF1F9 in its natural role, and a note on why the supporting colors balance it.

Japanese Sand Base · 5 colors

Base #EFF1F9 Surface #F2E8DD Highlight #F8F0E7 Secondary #BEADA2 Ink #2C2724

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.

Coastal Morning Lead · 5 colors

Lead #EFF1F9 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Cool White opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #EFF1F9 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #F8FAFF

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.

Nordic Calm Accent · 5 colors

Accent #EFF1F9 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

Cool White keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #EFF1F9 Secondary #F9FAFD Support #9D9088 Ink #18140F

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.

Build a working theme in the generator →

Color Lab

How #EFF1F9 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.

Warmth 48/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 94/100

Very high

Soft and easy on the eye — gentle backdrops, calm surfaces.

Depth 4/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 15/100

Very low

Clean and current — no dusty, aged cast.

Luxury 7/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 4/100

Very low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 2/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 93/100

Very high

Calm enough for large fills — backgrounds, cards, sections.

Print safety 98/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #EFF1F9

For UI

For branding

For interior

For fashion

People also use #EFF1F9 with

Gainsboro Cool White Off White Gunmetal Gray

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AAA

Body text Do not use for body copy on light surfaces. Avoid

Large display Only on dark surfaces. Avoid

Background Pair with #141310 text at 16.5:1. Use

Subtle surface Use #FCFDFE for cards and hover fills. Tint 80

Avoid beside #F1F0F9 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #EFF1F9 at work across the surfaces designers actually ship.

Website / UI

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A working theme, generated in seconds.

Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #EFF1F9;
  --color-base-rgb: 239 241 249;
  --color-base-oklch: oklch(95.9% 0.011 274.9);
  --color-50: #F4F5FB;
  --color-100: #E1E5F4;
  --color-200: #C4CBE8;
  --color-300: #9BA6D5;
  --color-400: #7483BE;
  --color-500: #5363A2;
  --color-600: #45507D;
  --color-700: #353D5A;
  --color-800: #262A3B;
  --color-900: #191B25;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  cool-white: {
    50: '#F4F5FB',
    100: '#E1E5F4',
    200: '#C4CBE8',
    300: '#9BA6D5',
    400: '#7483BE',
    500: '#5363A2',
    600: '#45507D',
    700: '#353D5A',
    800: '#262A3B',
    900: '#191B25',
  },
}

$base: #EFF1F9;
$base-ink: #141310;
$base-50: #F4F5FB;
$base-100: #E1E5F4;
$base-200: #C4CBE8;
$base-300: #9BA6D5;
$base-400: #7483BE;
$base-500: #5363A2;
$base-600: #45507D;
$base-700: #353D5A;
$base-800: #262A3B;
$base-900: #191B25;
$base-hover: #A9B4DE;
$base-subtle: #FBFBFD;

{
    "color": {
        "base": {
            "value": "#EFF1F9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F5FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E5F4",
                "type": "color"
            },
            "200": {
                "value": "#C4CBE8",
                "type": "color"
            },
            "300": {
                "value": "#9BA6D5",
                "type": "color"
            },
            "400": {
                "value": "#7483BE",
                "type": "color"
            },
            "500": {
                "value": "#5363A2",
                "type": "color"
            },
            "600": {
                "value": "#45507D",
                "type": "color"
            },
            "700": {
                "value": "#353D5A",
                "type": "color"
            },
            "800": {
                "value": "#262A3B",
                "type": "color"
            },
            "900": {
                "value": "#191B25",
                "type": "color"
            }
        }
    }
}

Palettes built on #EFF1F9

Color Lab

Pairs with #EFF1F9

UI roles & guardrails

In real applications

Scales

Every model

Export