What color is #04091F?

#04091F is a very dark, vivid blue. In RGB it is rgb(4, 9, 31), and in HSL hsl(229, 77%, 7%).

Is #04091F accessible as text?

On white, #04091F has a contrast ratio of 19.74:1 (passes WCAG AA for body text); on black it is 1.06:1 (fails). For text placed on #04091F, use white for the best readability.

What is the closest Tailwind color to #04091F?

The nearest Tailwind CSS token is mauve-950 (#0C090C).

What colors go well with #04091F?

#04091F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #201B04. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #04091F below.

Is #04091F good for buttons?

#04091F works well for buttons and highlights, but use white text on #04091F — black text only reaches 1.06:1, below the 4.5:1 needed for normal-size labels.

Is #04091F the same as CSS black?

No — #04091F is not the CSS named color black, but black (#000000) is the closest CSS named color.

#04091F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04091F

Not just a swatch — here's how #04091F works with other colors. Named schemes with #04091F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #04091F 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.

Nordic Calm Accent · 5 colors

Accent #04091F Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 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 #04091F Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #1D253C

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 #04091F Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

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 #F8F4EF Accent #04091F Secondary #282B34 Support #9D8F88 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 #04091F 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 39/100

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 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 20/100

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 19/100

Very low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 6/100

Very low

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

Surface fit 61/100

High

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

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #04091F

For UI

For branding

For interior

For fashion

People also use #04091F with

Prussian Blue Jet Black Graphite Gainsboro Gunmetal Gray

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 19.7:1. Use

Subtle surface Use #B5BFEA for cards and hover fills. Tint 80

Avoid beside #080420 — 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 #04091F 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: #04091F;
  --color-base-rgb: 4 9 31;
  --color-base-oklch: oklch(15.0% 0.048 267.7);
  --color-50: #F1F3FE;
  --color-100: #DAE0FB;
  --color-200: #B7C2F5;
  --color-300: #8698E9;
  --color-400: #5971D9;
  --color-500: #374FBE;
  --color-600: #314391;
  --color-700: #283466;
  --color-800: #1E2543;
  --color-900: #141829;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1F3FE',
    100: '#DAE0FB',
    200: '#B7C2F5',
    300: '#8698E9',
    400: '#5971D9',
    500: '#374FBE',
    600: '#314391',
    700: '#283466',
    800: '#1E2543',
    900: '#141829',
  },
}

$base: #04091F;
$base-ink: #FFFFFF;
$base-50: #F1F3FE;
$base-100: #DAE0FB;
$base-200: #B7C2F5;
$base-300: #8698E9;
$base-400: #5971D9;
$base-500: #374FBE;
$base-600: #314391;
$base-700: #283466;
$base-800: #1E2543;
$base-900: #141829;
$base-hover: #030719;
$base-subtle: #8E9DE1;

{
    "color": {
        "base": {
            "value": "#04091F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F3FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE0FB",
                "type": "color"
            },
            "200": {
                "value": "#B7C2F5",
                "type": "color"
            },
            "300": {
                "value": "#8698E9",
                "type": "color"
            },
            "400": {
                "value": "#5971D9",
                "type": "color"
            },
            "500": {
                "value": "#374FBE",
                "type": "color"
            },
            "600": {
                "value": "#314391",
                "type": "color"
            },
            "700": {
                "value": "#283466",
                "type": "color"
            },
            "800": {
                "value": "#1E2543",
                "type": "color"
            },
            "900": {
                "value": "#141829",
                "type": "color"
            }
        }
    }
}

Palettes built on #04091F

Color Lab

Pairs with #04091F

UI roles & guardrails

In real applications

Scales

Every model

Export