What color is #040B11?

#040B11 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(4, 11, 17), and in HSL hsl(208, 62%, 4%).

Is #040B11 accessible as text?

On white, #040B11 has a contrast ratio of 19.79:1 (passes WCAG AA for body text); on black it is 1.06:1 (fails). For text placed on #040B11, use white for the best readability.

What is the closest Tailwind color to #040B11?

The nearest Tailwind CSS token is zinc-950 (#09090B).

What colors go well with #040B11?

As a neutral, #040B11 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 #040B11 the same as CSS black?

No — #040B11 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040B11 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040B11

Not just a swatch — here's how #040B11 works with other colors. Named schemes with #040B11 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #040B11 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1E262D

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 #040B11 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

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 #040B11 Surface #ECEADC Highlight #F4F2E7 Secondary #B2B2A0 Ink #2A2823

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.

Coastal Morning Lead · 5 colors

Lead #040B11 Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #040B11 Secondary #272A2D Support #969386 Ink #16140F

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 #040B11 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 17/100

Very low

Firm and assertive — carries weight and contrast.

Depth 80/100

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 78/100

High

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 4/100

Very low

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

Surface fit 70/100

High

Calm enough for large fills — backgrounds, cards, sections.

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040B11

For UI

For branding

For interior

For fashion

People also use #040B11 with

Sacramento Green Jet Black Gainsboro Charcoal

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 19.8:1. Use

Subtle surface Use #B8CFE4 for cards and hover fills. Tint 80

Avoid beside #040611 — 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 #040B11 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: #040B11;
  --color-base-rgb: 4 11 17;
  --color-base-oklch: oklch(14.4% 0.019 240.2);
  --color-50: #F2F8FD;
  --color-100: #DDEBF8;
  --color-200: #BDD8EF;
  --color-300: #90BAE0;
  --color-400: #669CCC;
  --color-500: #447EB1;
  --color-600: #3A6387;
  --color-700: #2E4960;
  --color-800: #22313F;
  --color-900: #161F27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F2F8FD',
    100: '#DDEBF8',
    200: '#BDD8EF',
    300: '#90BAE0',
    400: '#669CCC',
    500: '#447EB1',
    600: '#3A6387',
    700: '#2E4960',
    800: '#22313F',
    900: '#161F27',
  },
}

$base: #040B11;
$base-ink: #FFFFFF;
$base-50: #F2F8FD;
$base-100: #DDEBF8;
$base-200: #BDD8EF;
$base-300: #90BAE0;
$base-400: #669CCC;
$base-500: #447EB1;
$base-600: #3A6387;
$base-700: #2E4960;
$base-800: #22313F;
$base-900: #161F27;
$base-hover: #03080D;
$base-subtle: #93B8D8;

{
    "color": {
        "base": {
            "value": "#040B11",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F8FD",
                "type": "color"
            },
            "100": {
                "value": "#DDEBF8",
                "type": "color"
            },
            "200": {
                "value": "#BDD8EF",
                "type": "color"
            },
            "300": {
                "value": "#90BAE0",
                "type": "color"
            },
            "400": {
                "value": "#669CCC",
                "type": "color"
            },
            "500": {
                "value": "#447EB1",
                "type": "color"
            },
            "600": {
                "value": "#3A6387",
                "type": "color"
            },
            "700": {
                "value": "#2E4960",
                "type": "color"
            },
            "800": {
                "value": "#22313F",
                "type": "color"
            },
            "900": {
                "value": "#161F27",
                "type": "color"
            }
        }
    }
}

Palettes built on #040B11

Color Lab

Pairs with #040B11

UI roles & guardrails

In real applications

Scales

Every model

Export