What color is #040A13?

#040A13 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(4, 10, 19), and in HSL hsl(216, 65%, 5%).

Is #040A13 accessible as text?

On white, #040A13 has a contrast ratio of 19.85:1 (passes WCAG AA for body text); on black it is 1.06:1 (fails). For text placed on #040A13, use white for the best readability.

What is the closest Tailwind color to #040A13?

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

What colors go well with #040A13?

As a neutral, #040A13 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 #040A13 the same as CSS black?

No — #040A13 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040A13 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040A13

Not just a swatch — here's how #040A13 works with other colors. Named schemes with #040A13 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040A13 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Nordic Calm Accent · 5 colors

Accent #040A13 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Jet Black keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #040A13 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1E252F

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 #040A13 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #040A13 Secondary #272A2D Support #9D8F89 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 #040A13 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 44/100

Neutral

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

Softness 16/100

Very low

Firm and assertive — carries weight and contrast.

Depth 80/100

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 79/100

High

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

Brand distinctiveness 9/100

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 69/100

High

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

Print safety 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040A13

For UI

For branding

For interior

For fashion

People also use #040A13 with

Bottle 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 #B8CAE5 for cards and hover fills. Tint 80

Avoid beside #040615 — 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 #040A13 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: #040A13;
  --color-base-rgb: 4 10 19;
  --color-base-oklch: oklch(14.2% 0.023 253.4);
  --color-50: #F2F6FD;
  --color-100: #DDE8F9;
  --color-200: #BCD1F1;
  --color-300: #8EAFE2;
  --color-400: #638ECF;
  --color-500: #416FB4;
  --color-600: #385989;
  --color-700: #2D4262;
  --color-800: #212D40;
  --color-900: #161D27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F2F6FD',
    100: '#DDE8F9',
    200: '#BCD1F1',
    300: '#8EAFE2',
    400: '#638ECF',
    500: '#416FB4',
    600: '#385989',
    700: '#2D4262',
    800: '#212D40',
    900: '#161D27',
  },
}

$base: #040A13;
$base-ink: #FFFFFF;
$base-50: #F2F6FD;
$base-100: #DDE8F9;
$base-200: #BCD1F1;
$base-300: #8EAFE2;
$base-400: #638ECF;
$base-500: #416FB4;
$base-600: #385989;
$base-700: #2D4262;
$base-800: #212D40;
$base-900: #161D27;
$base-hover: #040911;
$base-subtle: #92AFDA;

{
    "color": {
        "base": {
            "value": "#040A13",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F6FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE8F9",
                "type": "color"
            },
            "200": {
                "value": "#BCD1F1",
                "type": "color"
            },
            "300": {
                "value": "#8EAFE2",
                "type": "color"
            },
            "400": {
                "value": "#638ECF",
                "type": "color"
            },
            "500": {
                "value": "#416FB4",
                "type": "color"
            },
            "600": {
                "value": "#385989",
                "type": "color"
            },
            "700": {
                "value": "#2D4262",
                "type": "color"
            },
            "800": {
                "value": "#212D40",
                "type": "color"
            },
            "900": {
                "value": "#161D27",
                "type": "color"
            }
        }
    }
}

Palettes built on #040A13

Color Lab

Pairs with #040A13

UI roles & guardrails

In real applications

Scales

Every model

Export