What color is #040B02?

#040B02 is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(4, 11, 2), and in HSL hsl(107, 69%, 3%).

Is #040B02 accessible as text?

On white, #040B02 has a contrast ratio of 19.93:1 (passes WCAG AA for body text); on black it is 1.05:1 (fails). For text placed on #040B02, use white for the best readability.

What is the closest Tailwind color to #040B02?

The nearest Tailwind CSS token is neutral-950 (#0A0A0A).

What colors go well with #040B02?

As a neutral, #040B02 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 #040B02 the same as CSS black?

No — #040B02 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040B02 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040B02

Not just a swatch — here's how #040B02 works with other colors. Named schemes with #040B02 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #040B02 Secondary #4E6B3A Accent #AE6B00 Surface #EFEAD6 Anchor #3D2F21

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

Vintage Leather Lead · 5 colors

Lead #040B02 Secondary #764D1C Surface #E6DBC0 Accent #3D513F Anchor #5B2323

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 #040B02 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

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 #040B02 Anchor #141210 Accent #C2A64B Secondary #242B22 Surface #F2EDE3

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 #F7F4EF Accent #040B02 Secondary #262924 Support #999286 Ink #17140F

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 #040B02 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 51/100

Neutral

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

Softness 16/100

Very low

Firm and assertive — carries weight and contrast.

Depth 81/100

Very high

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

Naturalness 45/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 80/100

High

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

Brand distinctiveness 11/100

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 67/100

High

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

Print safety 94/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040B02

For UI

For branding

For interior

For fashion

People also use #040B02 with

Sacramento Green Jet Black Platinum Hunter Green

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 19.9:1. Use

Subtle surface Use #C0E6B5 for cards and hover fills. Tint 80

Avoid beside #020D04 — 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 #040B02 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: #040B02;
  --color-base-rgb: 4 11 2;
  --color-base-oklch: oklch(13.7% 0.029 136.6);
  --color-50: #F4FDF2;
  --color-100: #E2F9DC;
  --color-200: #C6F2BA;
  --color-300: #9EE48B;
  --color-400: #79D260;
  --color-500: #58B73E;
  --color-600: #498C36;
  --color-700: #38632C;
  --color-800: #274120;
  --color-900: #192815;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F4FDF2',
    100: '#E2F9DC',
    200: '#C6F2BA',
    300: '#9EE48B',
    400: '#79D260',
    500: '#58B73E',
    600: '#498C36',
    700: '#38632C',
    800: '#274120',
    900: '#192815',
  },
}

$base: #040B02;
$base-ink: #FFFFFF;
$base-50: #F4FDF2;
$base-100: #E2F9DC;
$base-200: #C6F2BA;
$base-300: #9EE48B;
$base-400: #79D260;
$base-500: #58B73E;
$base-600: #498C36;
$base-700: #38632C;
$base-800: #274120;
$base-900: #192815;
$base-hover: #040A02;
$base-subtle: #9FDC8E;

{
    "color": {
        "base": {
            "value": "#040B02",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FDF2",
                "type": "color"
            },
            "100": {
                "value": "#E2F9DC",
                "type": "color"
            },
            "200": {
                "value": "#C6F2BA",
                "type": "color"
            },
            "300": {
                "value": "#9EE48B",
                "type": "color"
            },
            "400": {
                "value": "#79D260",
                "type": "color"
            },
            "500": {
                "value": "#58B73E",
                "type": "color"
            },
            "600": {
                "value": "#498C36",
                "type": "color"
            },
            "700": {
                "value": "#38632C",
                "type": "color"
            },
            "800": {
                "value": "#274120",
                "type": "color"
            },
            "900": {
                "value": "#192815",
                "type": "color"
            }
        }
    }
}

Palettes built on #040B02

Color Lab

Pairs with #040B02

UI roles & guardrails

In real applications

Scales

Every model

Export