What color is #404B4F?

#404B4F is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(64, 75, 79), and in HSL hsl(196, 10%, 28%).

Is #404B4F accessible as text?

On white, #404B4F has a contrast ratio of 8.98:1 (passes WCAG AA for body text); on black it is 2.34:1 (fails). For text placed on #404B4F, use white for the best readability.

What is the closest Tailwind color to #404B4F?

The nearest Tailwind CSS token is neutral-700 (#404040).

What colors go well with #404B4F?

As a neutral, #404B4F 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 #404B4F the same as CSS darkslategray?

No — #404B4F 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.

#404B4F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #404B4F

Not just a swatch — here's how #404B4F works with other colors. Named schemes with #404B4F in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #404B4F Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #626C70

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 #404B4F Secondary #705116 Surface #E2DCC0 Accent #385244 Anchor #56233E

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 #404B4F Anchor #372C1D Surface #EBE5D0 Accent #7D9D75 Secondary #393933

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 #404B4F Surface #ECEADC Highlight #F4F2E7 Secondary #B3B19F 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 #404B4F Secondary #6D7172 Support #969386 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 #404B4F 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 45/100

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 28/100

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

Moderate

Workable accent with care around contrast.

Surface fit 54/100

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 #404B4F

For UI

For branding

For interior

For fashion

People also use #404B4F with

Ebony Charcoal 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 #D8DCDD for cards and hover fills. Tint 80

Avoid beside #40464F — 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 #404B4F at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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: #404B4F;
  --color-base-rgb: 64 75 79;
  --color-base-oklch: oklch(40.5% 0.016 221.7);
  --color-50: #F7F8F8;
  --color-100: #E8ECED;
  --color-200: #D2D8DA;
  --color-300: #B1BBBE;
  --color-400: #919DA1;
  --color-500: #727F83;
  --color-600: #5B6467;
  --color-700: #43494B;
  --color-800: #2E3233;
  --color-900: #1D1F20;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F7F8F8',
    100: '#E8ECED',
    200: '#D2D8DA',
    300: '#B1BBBE',
    400: '#919DA1',
    500: '#727F83',
    600: '#5B6467',
    700: '#43494B',
    800: '#2E3233',
    900: '#1D1F20',
  },
}

$base: #404B4F;
$base-ink: #FFFFFF;
$base-50: #F7F8F8;
$base-100: #E8ECED;
$base-200: #D2D8DA;
$base-300: #B1BBBE;
$base-400: #919DA1;
$base-500: #727F83;
$base-600: #5B6467;
$base-700: #43494B;
$base-800: #2E3233;
$base-900: #1D1F20;
$base-hover: #333C3F;
$base-subtle: #C4CACC;

{
    "color": {
        "base": {
            "value": "#404B4F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F8",
                "type": "color"
            },
            "100": {
                "value": "#E8ECED",
                "type": "color"
            },
            "200": {
                "value": "#D2D8DA",
                "type": "color"
            },
            "300": {
                "value": "#B1BBBE",
                "type": "color"
            },
            "400": {
                "value": "#919DA1",
                "type": "color"
            },
            "500": {
                "value": "#727F83",
                "type": "color"
            },
            "600": {
                "value": "#5B6467",
                "type": "color"
            },
            "700": {
                "value": "#43494B",
                "type": "color"
            },
            "800": {
                "value": "#2E3233",
                "type": "color"
            },
            "900": {
                "value": "#1D1F20",
                "type": "color"
            }
        }
    }
}

Palettes built on #404B4F

Color Lab

Pairs with #404B4F

UI roles & guardrails

In real applications

Scales

Every model

Export