What color is #040B39?

#040B39 is a very dark, vivid blue. In RGB it is rgb(4, 11, 57), and in HSL hsl(232, 87%, 12%).

Is #040B39 accessible as text?

On white, #040B39 has a contrast ratio of 18.88:1 (passes WCAG AA for body text); on black it is 1.11:1 (fails). For text placed on #040B39, use white for the best readability.

What is the closest Tailwind color to #040B39?

The nearest Tailwind CSS token is indigo-950 (#1E1A4D).

What colors go well with #040B39?

#040B39 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #393204. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040B39 below.

Is #040B39 good for buttons?

#040B39 works well for buttons and highlights, but use white text on #040B39 — black text only reaches 1.11:1, below the 4.5:1 needed for normal-size labels.

Is #040B39 the same as CSS midnightblue?

No — #040B39 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#040B39 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040B39

Not just a swatch — here's how #040B39 works with other colors. Named schemes with #040B39 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040B39 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Navy 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 #040B39 Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Navy 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 #040B39 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #1D2C57

Navy is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Navy.

Vintage Leather Lead · 5 colors

Lead #040B39 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

Navy 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 #040B39 Secondary #2D3444 Support #9D8F88 Ink #18140F

Navy 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 Navy carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #040B39 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 29/100

Cool

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

Softness 18/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 83/100

Very high

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

Brand distinctiveness 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 11/100

Very low

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

Surface fit 46/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040B39

For UI

For branding

For interior

For fashion

People also use #040B39 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 18.9:1. Use

Subtle surface Use #B6BEEE for cards and hover fills. Tint 80

Avoid beside #0F0439 — 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 #040B39 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: #040B39;
  --color-base-rgb: 4 11 57;
  --color-base-oklch: oklch(18.5% 0.089 267.4);
  --color-50: #F0F2FE;
  --color-100: #D8DDFD;
  --color-200: #B3BCFA;
  --color-300: #7F8EF0;
  --color-400: #5164E1;
  --color-500: #2E42C7;
  --color-600: #2B3997;
  --color-700: #242E6B;
  --color-800: #1C2145;
  --color-900: #13162A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  navy: {
    50: '#F0F2FE',
    100: '#D8DDFD',
    200: '#B3BCFA',
    300: '#7F8EF0',
    400: '#5164E1',
    500: '#2E42C7',
    600: '#2B3997',
    700: '#242E6B',
    800: '#1C2145',
    900: '#13162A',
  },
}

$base: #040B39;
$base-ink: #FFFFFF;
$base-50: #F0F2FE;
$base-100: #D8DDFD;
$base-200: #B3BCFA;
$base-300: #7F8EF0;
$base-400: #5164E1;
$base-500: #2E42C7;
$base-600: #2B3997;
$base-700: #242E6B;
$base-800: #1C2145;
$base-900: #13162A;
$base-hover: #03092E;
$base-subtle: #8F9BE8;

{
    "color": {
        "base": {
            "value": "#040B39",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DDFD",
                "type": "color"
            },
            "200": {
                "value": "#B3BCFA",
                "type": "color"
            },
            "300": {
                "value": "#7F8EF0",
                "type": "color"
            },
            "400": {
                "value": "#5164E1",
                "type": "color"
            },
            "500": {
                "value": "#2E42C7",
                "type": "color"
            },
            "600": {
                "value": "#2B3997",
                "type": "color"
            },
            "700": {
                "value": "#242E6B",
                "type": "color"
            },
            "800": {
                "value": "#1C2145",
                "type": "color"
            },
            "900": {
                "value": "#13162A",
                "type": "color"
            }
        }
    }
}

Palettes built on #040B39

Color Lab

Pairs with #040B39

UI roles & guardrails

In real applications

Scales

Every model

Export