What color is #040F28?

#040F28 is a very dark, vivid blue. In RGB it is rgb(4, 15, 40), and in HSL hsl(222, 82%, 9%).

Is #040F28 accessible as text?

On white, #040F28 has a contrast ratio of 19.02:1 (passes WCAG AA for body text); on black it is 1.10:1 (fails). For text placed on #040F28, use white for the best readability.

What is the closest Tailwind color to #040F28?

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

What colors go well with #040F28?

#040F28 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #2A1E04. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040F28 below.

Is #040F28 good for buttons?

#040F28 works well for buttons and highlights, but use white text on #040F28 — black text only reaches 1.10:1, below the 4.5:1 needed for normal-size labels.

Is #040F28 the same as CSS midnightblue?

No — #040F28 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.

#040F28 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040F28

Not just a swatch — here's how #040F28 works with other colors. Named schemes with #040F28 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040F28 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 #040F28 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #040F28 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1F2C45

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 #040F28 Secondary #7F4536 Surface #E1DDC1 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 #040F28 Secondary #2C323C 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 #040F28 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 36/100

Cool

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

Softness 19/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 80/100

High

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

Brand distinctiveness 21/100

Low

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

UI accent fit 8/100

Very low

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

Surface fit 57/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040F28

For UI

For branding

For interior

For fashion

People also use #040F28 with

Charcoal Jet Black Graphite Gainsboro

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 19.0:1. Use

Subtle surface Use #B5C6EC for cards and hover fills. Tint 80

Avoid beside #05042A — 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 #040F28 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: #040F28;
  --color-base-rgb: 4 15 40;
  --color-base-oklch: oklch(17.5% 0.054 262.2);
  --color-50: #F0F5FE;
  --color-100: #D9E4FC;
  --color-200: #B5C9F8;
  --color-300: #83A2ED;
  --color-400: #557EDD;
  --color-500: #325EC3;
  --color-600: #2E4C94;
  --color-700: #263A69;
  --color-800: #1D2944;
  --color-900: #141A2A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F0F5FE',
    100: '#D9E4FC',
    200: '#B5C9F8',
    300: '#83A2ED',
    400: '#557EDD',
    500: '#325EC3',
    600: '#2E4C94',
    700: '#263A69',
    800: '#1D2944',
    900: '#141A2A',
  },
}

$base: #040F28;
$base-ink: #FFFFFF;
$base-50: #F0F5FE;
$base-100: #D9E4FC;
$base-200: #B5C9F8;
$base-300: #83A2ED;
$base-400: #557EDD;
$base-500: #325EC3;
$base-600: #2E4C94;
$base-700: #263A69;
$base-800: #1D2944;
$base-900: #141A2A;
$base-hover: #030C21;
$base-subtle: #8EA8E5;

{
    "color": {
        "base": {
            "value": "#040F28",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E4FC",
                "type": "color"
            },
            "200": {
                "value": "#B5C9F8",
                "type": "color"
            },
            "300": {
                "value": "#83A2ED",
                "type": "color"
            },
            "400": {
                "value": "#557EDD",
                "type": "color"
            },
            "500": {
                "value": "#325EC3",
                "type": "color"
            },
            "600": {
                "value": "#2E4C94",
                "type": "color"
            },
            "700": {
                "value": "#263A69",
                "type": "color"
            },
            "800": {
                "value": "#1D2944",
                "type": "color"
            },
            "900": {
                "value": "#141A2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #040F28

Color Lab

Pairs with #040F28

UI roles & guardrails

In real applications

Scales

Every model

Export