What color is #424B45?

#424B45 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(66, 75, 69), and in HSL hsl(140, 6%, 28%).

Is #424B45 accessible as text?

On white, #424B45 has a contrast ratio of 9.04:1 (passes WCAG AA for body text); on black it is 2.32:1 (fails). For text placed on #424B45, use white for the best readability.

What is the closest Tailwind color to #424B45?

The nearest Tailwind CSS token is stone-700 (#44403B).

What colors go well with #424B45?

As a neutral, #424B45 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 #424B45 the same as CSS darkslategray?

No — #424B45 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.

#424B45 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #424B45

Not just a swatch — here's how #424B45 works with other colors. Named schemes with #424B45 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #424B45 Secondary #4A6C3D Accent #AC6C00 Surface #EEEAD6 Anchor #3C2F20

Outer Space leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Tech Product Signal · 5 colors

Signal #424B45 Surface #13161A Highlight #F4F6F8 Secondary #586771 Accent #646C66

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 #424B45 Secondary #744E1A Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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.

Japanese Sand Base · 5 colors

Base #424B45 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

Outer Space 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #424B45 Secondary #6D706E Support #989286 Ink #17140F

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 #424B45 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 49/100

Neutral

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 25/100

Low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 35/100

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 6/100

Very low

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

UI accent fit 40/100

Low

Workable accent with care around contrast.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #424B45

For UI

For branding

For interior

For fashion

People also use #424B45 with

Ebony Outer Space Platinum

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 9.0:1. Use

Subtle surface Use #D9DCDA for cards and hover fills. Tint 80

Avoid beside #434C49 — 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 #424B45 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: #424B45;
  --color-base-rgb: 66 75 69;
  --color-base-oklch: oklch(40.3% 0.015 156.5);
  --color-50: #F7F8F7;
  --color-100: #E9ECEA;
  --color-200: #D4D9D5;
  --color-300: #B4BBB6;
  --color-400: #949E97;
  --color-500: #758079;
  --color-600: #5D6560;
  --color-700: #454A46;
  --color-800: #2F3230;
  --color-900: #1D201E;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F7F8F7',
    100: '#E9ECEA',
    200: '#D4D9D5',
    300: '#B4BBB6',
    400: '#949E97',
    500: '#758079',
    600: '#5D6560',
    700: '#454A46',
    800: '#2F3230',
    900: '#1D201E',
  },
}

$base: #424B45;
$base-ink: #FFFFFF;
$base-50: #F7F8F7;
$base-100: #E9ECEA;
$base-200: #D4D9D5;
$base-300: #B4BBB6;
$base-400: #949E97;
$base-500: #758079;
$base-600: #5D6560;
$base-700: #454A46;
$base-800: #2F3230;
$base-900: #1D201E;
$base-hover: #363D38;
$base-subtle: #C5CAC7;

{
    "color": {
        "base": {
            "value": "#424B45",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F7",
                "type": "color"
            },
            "100": {
                "value": "#E9ECEA",
                "type": "color"
            },
            "200": {
                "value": "#D4D9D5",
                "type": "color"
            },
            "300": {
                "value": "#B4BBB6",
                "type": "color"
            },
            "400": {
                "value": "#949E97",
                "type": "color"
            },
            "500": {
                "value": "#758079",
                "type": "color"
            },
            "600": {
                "value": "#5D6560",
                "type": "color"
            },
            "700": {
                "value": "#454A46",
                "type": "color"
            },
            "800": {
                "value": "#2F3230",
                "type": "color"
            },
            "900": {
                "value": "#1D201E",
                "type": "color"
            }
        }
    }
}

Palettes built on #424B45

Color Lab

Pairs with #424B45

UI roles & guardrails

In real applications

Scales

Every model

Export