What color is #424C57?

#424C57 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(66, 76, 87), and in HSL hsl(211, 14%, 30%).

Is #424C57 accessible as text?

On white, #424C57 has a contrast ratio of 8.74:1 (passes WCAG AA for body text); on black it is 2.40:1 (fails). For text placed on #424C57, use white for the best readability.

What is the closest Tailwind color to #424C57?

The nearest Tailwind CSS token is zinc-600 (#52525C).

What colors go well with #424C57?

As a neutral, #424C57 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #424C57 the same as CSS darkslategray?

No — #424C57 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) 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.

#424C57 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #424C57

Not just a swatch — here's how #424C57 works with other colors. Named schemes with #424C57 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #424C57 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Nordic Calm Accent · 5 colors

Accent #424C57 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

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

Tech Product Signal · 5 colors

Signal #424C57 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #646D78

Outer Space is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Outer Space.

Vintage Leather Lead · 5 colors

Lead #424C57 Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Outer Space plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #424C57 Secondary #6F7277 Support #959386 Ink #16140F

Outer Space 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 Outer Space carrying the quiet middle.

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Color Lab

How #424C57 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 44/100

Neutral

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 55/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 9/100

Very low

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

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 51/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #424C57

For UI

For branding

For interior

For fashion

People also use #424C57 with

Dim Gray Charcoal Umber Gainsboro

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 8.7:1. Use

Subtle surface Use #D8DBDF for cards and hover fills. Tint 80

Avoid beside #424557 — 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 #424C57 at work across the surfaces designers actually ship.

Website / UI

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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: #424C57;
  --color-base-rgb: 66 76 87;
  --color-base-oklch: oklch(41.2% 0.023 250.9);
  --color-50: #F6F7F9;
  --color-100: #E8EAEE;
  --color-200: #D1D6DC;
  --color-300: #AFB7C1;
  --color-400: #8D99A5;
  --color-500: #6E7A87;
  --color-600: #58616A;
  --color-700: #42474D;
  --color-800: #2D3034;
  --color-900: #1D1F20;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F6F7F9',
    100: '#E8EAEE',
    200: '#D1D6DC',
    300: '#AFB7C1',
    400: '#8D99A5',
    500: '#6E7A87',
    600: '#58616A',
    700: '#42474D',
    800: '#2D3034',
    900: '#1D1F20',
  },
}

$base: #424C57;
$base-ink: #FFFFFF;
$base-50: #F6F7F9;
$base-100: #E8EAEE;
$base-200: #D1D6DC;
$base-300: #AFB7C1;
$base-400: #8D99A5;
$base-500: #6E7A87;
$base-600: #58616A;
$base-700: #42474D;
$base-800: #2D3034;
$base-900: #1D1F20;
$base-hover: #353D46;
$base-subtle: #C4C9CF;

{
    "color": {
        "base": {
            "value": "#424C57",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E8EAEE",
                "type": "color"
            },
            "200": {
                "value": "#D1D6DC",
                "type": "color"
            },
            "300": {
                "value": "#AFB7C1",
                "type": "color"
            },
            "400": {
                "value": "#8D99A5",
                "type": "color"
            },
            "500": {
                "value": "#6E7A87",
                "type": "color"
            },
            "600": {
                "value": "#58616A",
                "type": "color"
            },
            "700": {
                "value": "#42474D",
                "type": "color"
            },
            "800": {
                "value": "#2D3034",
                "type": "color"
            },
            "900": {
                "value": "#1D1F20",
                "type": "color"
            }
        }
    }
}

Palettes built on #424C57

Color Lab

Pairs with #424C57

UI roles & guardrails

In real applications

Scales

Every model

Export