What color is #03091B?

#03091B is a very dark, vivid blue. In RGB it is rgb(3, 9, 27), and in HSL hsl(225, 80%, 6%).

Is #03091B accessible as text?

On white, #03091B has a contrast ratio of 19.83:1 (passes WCAG AA for body text); on black it is 1.06:1 (fails). For text placed on #03091B, use white for the best readability.

What is the closest Tailwind color to #03091B?

The nearest Tailwind CSS token is mist-950 (#090B0C).

What colors go well with #03091B?

#03091B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #1C1503. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03091B below.

Is #03091B good for buttons?

#03091B works well for buttons and highlights, but use white text on #03091B — black text only reaches 1.06:1, below the 4.5:1 needed for normal-size labels.

Is #03091B the same as CSS black?

No — #03091B is not the CSS named color black, but black (#000000) is the closest CSS named color.

#03091B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03091B

Not just a swatch — here's how #03091B works with other colors. Named schemes with #03091B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #03091B Accent #A5C4C1 Surface #DDDBBF 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 #03091B Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 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 #03091B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1C2537

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 #03091B Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

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 #03091B Secondary #262A31 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 #03091B 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 40/100

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 18/100

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 16/100

Very low

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

UI accent fit 5/100

Very low

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

Surface fit 63/100

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 #03091B

For UI

For branding

For interior

For fashion

People also use #03091B with

Gunmetal Gray Jet Black Graphite 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 #B3C1EB for cards and hover fills. Tint 80

Avoid beside #05031C — 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 #03091B 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: #03091B;
  --color-base-rgb: 3 9 27;
  --color-base-oklch: oklch(14.5% 0.041 263.3);
  --color-50: #F1F4FE;
  --color-100: #D9E2FC;
  --color-200: #B6C6F7;
  --color-300: #849EEB;
  --color-400: #5778DB;
  --color-500: #3457C1;
  --color-600: #2F4893;
  --color-700: #273768;
  --color-800: #1D2744;
  --color-900: #141929;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1F4FE',
    100: '#D9E2FC',
    200: '#B6C6F7',
    300: '#849EEB',
    400: '#5778DB',
    500: '#3457C1',
    600: '#2F4893',
    700: '#273768',
    800: '#1D2744',
    900: '#141929',
  },
}

$base: #03091B;
$base-ink: #FFFFFF;
$base-50: #F1F4FE;
$base-100: #D9E2FC;
$base-200: #B6C6F7;
$base-300: #849EEB;
$base-400: #5778DB;
$base-500: #3457C1;
$base-600: #2F4893;
$base-700: #273768;
$base-800: #1D2744;
$base-900: #141929;
$base-hover: #020716;
$base-subtle: #8BA1E3;

{
    "color": {
        "base": {
            "value": "#03091B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F4FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E2FC",
                "type": "color"
            },
            "200": {
                "value": "#B6C6F7",
                "type": "color"
            },
            "300": {
                "value": "#849EEB",
                "type": "color"
            },
            "400": {
                "value": "#5778DB",
                "type": "color"
            },
            "500": {
                "value": "#3457C1",
                "type": "color"
            },
            "600": {
                "value": "#2F4893",
                "type": "color"
            },
            "700": {
                "value": "#273768",
                "type": "color"
            },
            "800": {
                "value": "#1D2744",
                "type": "color"
            },
            "900": {
                "value": "#141929",
                "type": "color"
            }
        }
    }
}

Palettes built on #03091B

Color Lab

Pairs with #03091B

UI roles & guardrails

In real applications

Scales

Every model

Export