What color is #040F19?

#040F19 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(4, 15, 25), and in HSL hsl(209, 72%, 6%).

Is #040F19 accessible as text?

On white, #040F19 has a contrast ratio of 19.31:1 (passes WCAG AA for body text); on black it is 1.09:1 (fails). For text placed on #040F19, use white for the best readability.

What is the closest Tailwind color to #040F19?

The nearest Tailwind CSS token is zinc-950 (#09090B).

What colors go well with #040F19?

As a neutral, #040F19 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 #040F19 the same as CSS black?

No — #040F19 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040F19 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040F19

Not just a swatch — here's how #040F19 works with other colors. Named schemes with #040F19 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040F19 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

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 #040F19 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #040F19 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1F2B35

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 #040F19 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

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 #F6F4EF Accent #040F19 Secondary #2B2F33 Support #969386 Ink #16140F

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.

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Color Lab

How #040F19 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 42/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 18/100

Very low

Firm and assertive — carries weight and contrast.

Depth 79/100

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 78/100

High

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

Brand distinctiveness 11/100

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 66/100

High

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

Print safety 94/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040F19

For UI

For branding

For interior

For fashion

People also use #040F19 with

Bottle Green Jet Black 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 19.3:1. Use

Subtle surface Use #B6D0E8 for cards and hover fills. Tint 80

Avoid beside #04081A — 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 #040F19 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: #040F19;
  --color-base-rgb: 4 15 25;
  --color-base-oklch: oklch(16.3% 0.028 244.6);
  --color-50: #F1F8FD;
  --color-100: #DBEBFA;
  --color-200: #B9D7F3;
  --color-300: #89B9E6;
  --color-400: #5D9BD5;
  --color-500: #3B7DBA;
  --color-600: #34628E;
  --color-700: #2A4864;
  --color-800: #1F3142;
  --color-900: #151F28;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1F8FD',
    100: '#DBEBFA',
    200: '#B9D7F3',
    300: '#89B9E6',
    400: '#5D9BD5',
    500: '#3B7DBA',
    600: '#34628E',
    700: '#2A4864',
    800: '#1F3142',
    900: '#151F28',
  },
}

$base: #040F19;
$base-ink: #FFFFFF;
$base-50: #F1F8FD;
$base-100: #DBEBFA;
$base-200: #B9D7F3;
$base-300: #89B9E6;
$base-400: #5D9BD5;
$base-500: #3B7DBA;
$base-600: #34628E;
$base-700: #2A4864;
$base-800: #1F3142;
$base-900: #151F28;
$base-hover: #030D15;
$base-subtle: #90B8DE;

{
    "color": {
        "base": {
            "value": "#040F19",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F8FD",
                "type": "color"
            },
            "100": {
                "value": "#DBEBFA",
                "type": "color"
            },
            "200": {
                "value": "#B9D7F3",
                "type": "color"
            },
            "300": {
                "value": "#89B9E6",
                "type": "color"
            },
            "400": {
                "value": "#5D9BD5",
                "type": "color"
            },
            "500": {
                "value": "#3B7DBA",
                "type": "color"
            },
            "600": {
                "value": "#34628E",
                "type": "color"
            },
            "700": {
                "value": "#2A4864",
                "type": "color"
            },
            "800": {
                "value": "#1F3142",
                "type": "color"
            },
            "900": {
                "value": "#151F28",
                "type": "color"
            }
        }
    }
}

Palettes built on #040F19

Color Lab

Pairs with #040F19

UI roles & guardrails

In real applications

Scales

Every model

Export