What color is #040B2E?

#040B2E is a very dark, vivid blue. In RGB it is rgb(4, 11, 46), and in HSL hsl(230, 84%, 10%).

Is #040B2E accessible as text?

On white, #040B2E has a contrast ratio of 19.22:1 (passes WCAG AA for body text); on black it is 1.09:1 (fails). For text placed on #040B2E, use white for the best readability.

What is the closest Tailwind color to #040B2E?

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

What colors go well with #040B2E?

#040B2E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #2F2804. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040B2E below.

Is #040B2E good for buttons?

#040B2E works well for buttons and highlights, but use white text on #040B2E — black text only reaches 1.09:1, below the 4.5:1 needed for normal-size labels.

Is #040B2E the same as CSS midnightblue?

No — #040B2E is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#040B2E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040B2E

Not just a swatch — here's how #040B2E works with other colors. Named schemes with #040B2E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040B2E 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 #040B2E 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 #040B2E Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #1D2A4B

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 #040B2E 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 #040B2E Secondary #2B303E 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 #040B2E 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 33/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 17/100

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 25/100

Low

A faint retro warmth without tipping into sepia.

Luxury 82/100

Very high

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

Brand distinctiveness 27/100

Low

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

UI accent fit 9/100

Very low

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

Surface fit 52/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040B2E

For UI

For branding

For interior

For fashion

People also use #040B2E with

Charcoal Deep Purple Bistre 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 19.2:1. Use

Subtle surface Use #B5BFED for cards and hover fills. Tint 80

Avoid beside #0B042F — 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 #040B2E 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: #040B2E;
  --color-base-rgb: 4 11 46;
  --color-base-oklch: oklch(17.1% 0.071 267.4);
  --color-50: #F0F3FE;
  --color-100: #D8DFFD;
  --color-200: #B4BFF8;
  --color-300: #8193EE;
  --color-400: #536BDF;
  --color-500: #3049C4;
  --color-600: #2D3E95;
  --color-700: #253169;
  --color-800: #1C2345;
  --color-900: #13172A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F0F3FE',
    100: '#D8DFFD',
    200: '#B4BFF8',
    300: '#8193EE',
    400: '#536BDF',
    500: '#3049C4',
    600: '#2D3E95',
    700: '#253169',
    800: '#1C2345',
    900: '#13172A',
  },
}

$base: #040B2E;
$base-ink: #FFFFFF;
$base-50: #F0F3FE;
$base-100: #D8DFFD;
$base-200: #B4BFF8;
$base-300: #8193EE;
$base-400: #536BDF;
$base-500: #3049C4;
$base-600: #2D3E95;
$base-700: #253169;
$base-800: #1C2345;
$base-900: #13172A;
$base-hover: #030926;
$base-subtle: #8E9DE6;

{
    "color": {
        "base": {
            "value": "#040B2E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F3FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DFFD",
                "type": "color"
            },
            "200": {
                "value": "#B4BFF8",
                "type": "color"
            },
            "300": {
                "value": "#8193EE",
                "type": "color"
            },
            "400": {
                "value": "#536BDF",
                "type": "color"
            },
            "500": {
                "value": "#3049C4",
                "type": "color"
            },
            "600": {
                "value": "#2D3E95",
                "type": "color"
            },
            "700": {
                "value": "#253169",
                "type": "color"
            },
            "800": {
                "value": "#1C2345",
                "type": "color"
            },
            "900": {
                "value": "#13172A",
                "type": "color"
            }
        }
    }
}

Palettes built on #040B2E

Color Lab

Pairs with #040B2E

UI roles & guardrails

In real applications

Scales

Every model

Export