What color is #040B05?

#040B05 is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(4, 11, 5), and in HSL hsl(129, 47%, 3%).

Is #040B05 accessible as text?

On white, #040B05 has a contrast ratio of 19.90:1 (passes WCAG AA for body text); on black it is 1.06:1 (fails). For text placed on #040B05, use white for the best readability.

What is the closest Tailwind color to #040B05?

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

What colors go well with #040B05?

As a neutral, #040B05 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 #040B05 the same as CSS black?

No — #040B05 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040B05 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040B05

Not just a swatch — here's how #040B05 works with other colors. Named schemes with #040B05 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #040B05 Secondary #4B6C3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

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

Tech Product Signal · 5 colors

Signal #040B05 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #1E261F

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 #040B05 Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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 #040B05 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #040B05 Secondary #262926 Support #989286 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 #040B05 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 49/100

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 33/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 18/100

Very low

Clean and current — no dusty, aged cast.

Luxury 79/100

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 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 #040B05

For UI

For branding

For interior

For fashion

People also use #040B05 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 #BDDEC2 for cards and hover fills. Tint 80

Avoid beside #040B08 — 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 #040B05 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: #040B05;
  --color-base-rgb: 4 11 5;
  --color-base-oklch: oklch(13.8% 0.020 149.1);
  --color-50: #F3FBF5;
  --color-100: #E0F5E4;
  --color-200: #C3E9C9;
  --color-300: #99D6A2;
  --color-400: #72C07E;
  --color-500: #51A45D;
  --color-600: #447E4C;
  --color-700: #345A3A;
  --color-800: #253C29;
  --color-900: #18251A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F3FBF5',
    100: '#E0F5E4',
    200: '#C3E9C9',
    300: '#99D6A2',
    400: '#72C07E',
    500: '#51A45D',
    600: '#447E4C',
    700: '#345A3A',
    800: '#253C29',
    900: '#18251A',
  },
}

$base: #040B05;
$base-ink: #FFFFFF;
$base-50: #F3FBF5;
$base-100: #E0F5E4;
$base-200: #C3E9C9;
$base-300: #99D6A2;
$base-400: #72C07E;
$base-500: #51A45D;
$base-600: #447E4C;
$base-700: #345A3A;
$base-800: #253C29;
$base-900: #18251A;
$base-hover: #030904;
$base-subtle: #9ACFA2;

{
    "color": {
        "base": {
            "value": "#040B05",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FBF5",
                "type": "color"
            },
            "100": {
                "value": "#E0F5E4",
                "type": "color"
            },
            "200": {
                "value": "#C3E9C9",
                "type": "color"
            },
            "300": {
                "value": "#99D6A2",
                "type": "color"
            },
            "400": {
                "value": "#72C07E",
                "type": "color"
            },
            "500": {
                "value": "#51A45D",
                "type": "color"
            },
            "600": {
                "value": "#447E4C",
                "type": "color"
            },
            "700": {
                "value": "#345A3A",
                "type": "color"
            },
            "800": {
                "value": "#253C29",
                "type": "color"
            },
            "900": {
                "value": "#18251A",
                "type": "color"
            }
        }
    }
}

Palettes built on #040B05

Color Lab

Pairs with #040B05

UI roles & guardrails

In real applications

Scales

Every model

Export