What color is #04040B?

#04040B is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(4, 4, 11), and in HSL hsl(240, 47%, 3%).

Is #04040B accessible as text?

On white, #04040B has a contrast ratio of 20.44:1 (passes WCAG AA for body text); on black it is 1.03:1 (fails). For text placed on #04040B, use white for the best readability.

What is the closest Tailwind color to #04040B?

The nearest Tailwind CSS token is gray-950 (#030712).

What colors go well with #04040B?

As a neutral, #04040B 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 #04040B the same as CSS black?

No — #04040B is not the CSS named color black, but black (#000000) is the closest CSS named color.

#04040B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04040B

Not just a swatch — here's how #04040B works with other colors. Named schemes with #04040B in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #04040B Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #1C1C26

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

Vintage Leather Lead · 5 colors

Lead #04040B Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

Jet Black 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 #04040B Surface #F2E8DD Highlight #F8F0E7 Secondary #BEADA2 Ink #2C2724

Jet Black 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.

Luxury Packaging Feature · 5 colors

Feature #04040B Anchor #141210 Accent #DB9758 Secondary #272833 Surface #F3ECE3

Jet Black carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #04040B Secondary #222225 Support #9D9088 Ink #18140F

Jet Black 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 Jet Black carrying the quiet middle.

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Color Lab

How #04040B 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 13/100

Very low

Firm and assertive — carries weight and contrast.

Depth 83/100

Very high

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 15/100

Very low

Clean and current — no dusty, aged cast.

Luxury 81/100

Very high

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

Brand distinctiveness 8/100

Very low

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

UI accent fit 3/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 72/100

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 #04040B

For UI

For branding

For interior

For fashion

People also use #04040B with

Graphite Jet Black Gainsboro Prussian Blue

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 20.4:1. Use

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

Avoid beside #06040B — 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 #04040B 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: #04040B;
  --color-base-rgb: 4 4 11;
  --color-base-oklch: oklch(11.2% 0.020 282.7);
  --color-50: #F3F3FB;
  --color-100: #E0E0F5;
  --color-200: #C3C3E9;
  --color-300: #9999D6;
  --color-400: #7272C0;
  --color-500: #5151A4;
  --color-600: #44447E;
  --color-700: #34345A;
  --color-800: #25253C;
  --color-900: #181825;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F3F3FB',
    100: '#E0E0F5',
    200: '#C3C3E9',
    300: '#9999D6',
    400: '#7272C0',
    500: '#5151A4',
    600: '#44447E',
    700: '#34345A',
    800: '#25253C',
    900: '#181825',
  },
}

$base: #04040B;
$base-ink: #FFFFFF;
$base-50: #F3F3FB;
$base-100: #E0E0F5;
$base-200: #C3C3E9;
$base-300: #9999D6;
$base-400: #7272C0;
$base-500: #5151A4;
$base-600: #44447E;
$base-700: #34345A;
$base-800: #25253C;
$base-900: #181825;
$base-hover: #030309;
$base-subtle: #9A9ACF;

{
    "color": {
        "base": {
            "value": "#04040B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F3FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E0F5",
                "type": "color"
            },
            "200": {
                "value": "#C3C3E9",
                "type": "color"
            },
            "300": {
                "value": "#9999D6",
                "type": "color"
            },
            "400": {
                "value": "#7272C0",
                "type": "color"
            },
            "500": {
                "value": "#5151A4",
                "type": "color"
            },
            "600": {
                "value": "#44447E",
                "type": "color"
            },
            "700": {
                "value": "#34345A",
                "type": "color"
            },
            "800": {
                "value": "#25253C",
                "type": "color"
            },
            "900": {
                "value": "#181825",
                "type": "color"
            }
        }
    }
}

Palettes built on #04040B

Color Lab

Pairs with #04040B

UI roles & guardrails

In real applications

Scales

Every model

Export