What color is #404E4D?

#404E4D is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(64, 78, 77), and in HSL hsl(176, 10%, 28%).

Is #404E4D accessible as text?

On white, #404E4D has a contrast ratio of 8.70:1 (passes WCAG AA for body text); on black it is 2.41:1 (fails). For text placed on #404E4D, use white for the best readability.

What is the closest Tailwind color to #404E4D?

The nearest Tailwind CSS token is neutral-600 (#525252).

What colors go well with #404E4D?

As a neutral, #404E4D 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 #404E4D the same as CSS darkslategray?

No — #404E4D 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.

#404E4D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #404E4D

Not just a swatch — here's how #404E4D works with other colors. Named schemes with #404E4D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #404E4D Surface #14161A Highlight #F4F6F8 Secondary #586771 Accent #626F6E

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 #404E4D Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552341

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.

Modern Café Dominant · 5 colors

Dominant #404E4D Anchor #382B1E Surface #ECE4D0 Accent #819C71 Secondary #3A3833

Outer Space anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Japanese Sand Base · 5 colors

Base #404E4D Surface #EDEADC Highlight #F5F2E7 Secondary #B4B19F 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 #F6F4EF Accent #404E4D Secondary #6E7373 Support #979286 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 #404E4D 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 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 55/100

Moderate

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

Naturalness 6/100

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 7/100

Very low

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

UI accent fit 43/100

Moderate

Workable accent with care around contrast.

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #404E4D

For UI

For branding

For interior

For fashion

People also use #404E4D with

Ebony Outer Space Taupe 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 8.7:1. Use

Subtle surface Use #D8DDDD for cards and hover fills. Tint 80

Avoid beside #404B4F — 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 #404E4D at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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: #404E4D;
  --color-base-rgb: 64 78 77;
  --color-base-oklch: oklch(41.1% 0.018 191.2);
  --color-50: #F7F8F8;
  --color-100: #E8EDEC;
  --color-200: #D2DADA;
  --color-300: #B1BEBD;
  --color-400: #91A1A0;
  --color-500: #728382;
  --color-600: #5B6766;
  --color-700: #434B4B;
  --color-800: #2E3333;
  --color-900: #1D2020;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F7F8F8',
    100: '#E8EDEC',
    200: '#D2DADA',
    300: '#B1BEBD',
    400: '#91A1A0',
    500: '#728382',
    600: '#5B6766',
    700: '#434B4B',
    800: '#2E3333',
    900: '#1D2020',
  },
}

$base: #404E4D;
$base-ink: #FFFFFF;
$base-50: #F7F8F8;
$base-100: #E8EDEC;
$base-200: #D2DADA;
$base-300: #B1BEBD;
$base-400: #91A1A0;
$base-500: #728382;
$base-600: #5B6766;
$base-700: #434B4B;
$base-800: #2E3333;
$base-900: #1D2020;
$base-hover: #333F3E;
$base-subtle: #C4CCCC;

{
    "color": {
        "base": {
            "value": "#404E4D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F8",
                "type": "color"
            },
            "100": {
                "value": "#E8EDEC",
                "type": "color"
            },
            "200": {
                "value": "#D2DADA",
                "type": "color"
            },
            "300": {
                "value": "#B1BEBD",
                "type": "color"
            },
            "400": {
                "value": "#91A1A0",
                "type": "color"
            },
            "500": {
                "value": "#728382",
                "type": "color"
            },
            "600": {
                "value": "#5B6766",
                "type": "color"
            },
            "700": {
                "value": "#434B4B",
                "type": "color"
            },
            "800": {
                "value": "#2E3333",
                "type": "color"
            },
            "900": {
                "value": "#1D2020",
                "type": "color"
            }
        }
    }
}

Palettes built on #404E4D

Color Lab

Pairs with #404E4D

UI roles & guardrails

In real applications

Scales

Every model

Export