What color is #ECF3FD?

#ECF3FD is a pale low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(236, 243, 253), and in HSL hsl(215, 81%, 96%).

Is #ECF3FD accessible as text?

On white, #ECF3FD has a contrast ratio of 1.12:1 (fails WCAG AA for body text); on black it is 18.81:1 (passes). For text placed on #ECF3FD, use black for the best readability.

What is the closest Tailwind color to #ECF3FD?

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

What colors go well with #ECF3FD?

As a neutral, #ECF3FD 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 #ECF3FD the same as CSS aliceblue?

No — #ECF3FD is not the CSS named color aliceblue, but aliceblue (#F0F8FF) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#ECF3FD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #ECF3FD

Not just a swatch — here's how #ECF3FD works with other colors. Named schemes with #ECF3FD in its natural role, and a note on why the supporting colors balance it.

Japanese Sand Base · 5 colors

Base #ECF3FD Surface #EBEADC Highlight #F4F2E7 Secondary #B1B2A0 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 #ECF3FD Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #ECF3FD Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #F4FBFF

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 #ECF3FD Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #F6F4EF Accent #ECF3FD Secondary #F8FAFE Support #9D8F89 Ink #16140F

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 #ECF3FD 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 46/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 6/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 6/100

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 92/100

Very high

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

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #ECF3FD

For UI

For branding

For interior

For fashion

People also use #ECF3FD with

Celeste Cool White Seashell Gainsboro Charcoal

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 16.6:1. Use

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

Avoid beside #EDEEFD — 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 #ECF3FD at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #ECF3FD;
  --color-base-rgb: 236 243 253;
  --color-base-oklch: oklch(96.2% 0.015 257.2);
  --color-50: #F1F6FE;
  --color-100: #D9E8FC;
  --color-200: #B5D1F7;
  --color-300: #83AFEC;
  --color-400: #568EDC;
  --color-500: #336FC2;
  --color-600: #2E5893;
  --color-700: #274268;
  --color-800: #1D2D44;
  --color-900: #141D2A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  cool-white: {
    50: '#F1F6FE',
    100: '#D9E8FC',
    200: '#B5D1F7',
    300: '#83AFEC',
    400: '#568EDC',
    500: '#336FC2',
    600: '#2E5893',
    700: '#274268',
    800: '#1D2D44',
    900: '#141D2A',
  },
}

$base: #ECF3FD;
$base-ink: #141310;
$base-50: #F1F6FE;
$base-100: #D9E8FC;
$base-200: #B5D1F7;
$base-300: #83AFEC;
$base-400: #568EDC;
$base-500: #336FC2;
$base-600: #2E5893;
$base-700: #274268;
$base-800: #1D2D44;
$base-900: #141D2A;
$base-hover: #94BCF4;
$base-subtle: #FAFCFE;

{
    "color": {
        "base": {
            "value": "#ECF3FD",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E8FC",
                "type": "color"
            },
            "200": {
                "value": "#B5D1F7",
                "type": "color"
            },
            "300": {
                "value": "#83AFEC",
                "type": "color"
            },
            "400": {
                "value": "#568EDC",
                "type": "color"
            },
            "500": {
                "value": "#336FC2",
                "type": "color"
            },
            "600": {
                "value": "#2E5893",
                "type": "color"
            },
            "700": {
                "value": "#274268",
                "type": "color"
            },
            "800": {
                "value": "#1D2D44",
                "type": "color"
            },
            "900": {
                "value": "#141D2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #ECF3FD

Color Lab

Pairs with #ECF3FD

UI roles & guardrails

In real applications

Scales

Every model

Export