What color is #03040D?

#03040D is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(3, 4, 13), and in HSL hsl(234, 63%, 3%).

Is #03040D accessible as text?

On white, #03040D has a contrast ratio of 20.45:1 (passes WCAG AA for body text); on black it is 1.03:1 (fails). For text placed on #03040D, use white for the best readability.

What is the closest Tailwind color to #03040D?

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

What colors go well with #03040D?

As a neutral, #03040D 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 #03040D the same as CSS black?

No — #03040D is not the CSS named color black, but black (#000000) is the closest CSS named color.

#03040D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03040D

Not just a swatch — here's how #03040D works with other colors. Named schemes with #03040D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #03040D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #1A1D28

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 #03040D Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

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 #03040D Surface #F2E8DD Highlight #F8F0E7 Secondary #BEACA2 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.

Coastal Morning Lead · 5 colors

Lead #03040D Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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 #F8F4EF Accent #03040D Secondary #212226 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.

Build a working theme in the generator →

Color Lab

How #03040D 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 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 10/100

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 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 #03040D

For UI

For branding

For interior

For fashion

People also use #03040D 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 #B7BCE4 for cards and hover fills. Tint 80

Avoid beside #05030C — 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 #03040D at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #03040D;
  --color-base-rgb: 3 4 13;
  --color-base-oklch: oklch(11.2% 0.025 274.3);
  --color-50: #F2F3FD;
  --color-100: #DDE0F8;
  --color-200: #BDC2F0;
  --color-300: #8F97E0;
  --color-400: #656FCD;
  --color-500: #434EB2;
  --color-600: #3A4288;
  --color-700: #2E3361;
  --color-800: #212440;
  --color-900: #161827;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F2F3FD',
    100: '#DDE0F8',
    200: '#BDC2F0',
    300: '#8F97E0',
    400: '#656FCD',
    500: '#434EB2',
    600: '#3A4288',
    700: '#2E3361',
    800: '#212440',
    900: '#161827',
  },
}

$base: #03040D;
$base-ink: #FFFFFF;
$base-50: #F2F3FD;
$base-100: #DDE0F8;
$base-200: #BDC2F0;
$base-300: #8F97E0;
$base-400: #656FCD;
$base-500: #434EB2;
$base-600: #3A4288;
$base-700: #2E3361;
$base-800: #212440;
$base-900: #161827;
$base-hover: #02030A;
$base-subtle: #9198D8;

{
    "color": {
        "base": {
            "value": "#03040D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F3FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE0F8",
                "type": "color"
            },
            "200": {
                "value": "#BDC2F0",
                "type": "color"
            },
            "300": {
                "value": "#8F97E0",
                "type": "color"
            },
            "400": {
                "value": "#656FCD",
                "type": "color"
            },
            "500": {
                "value": "#434EB2",
                "type": "color"
            },
            "600": {
                "value": "#3A4288",
                "type": "color"
            },
            "700": {
                "value": "#2E3361",
                "type": "color"
            },
            "800": {
                "value": "#212440",
                "type": "color"
            },
            "900": {
                "value": "#161827",
                "type": "color"
            }
        }
    }
}

Palettes built on #03040D

Color Lab

Pairs with #03040D

UI roles & guardrails

In real applications

Scales

Every model

Export