What color is #04029A?

#04029A is a dark, vivid blue. In RGB it is rgb(4, 2, 154), and in HSL hsl(241, 97%, 31%).

Is #04029A accessible as text?

On white, #04029A has a contrast ratio of 14.18:1 (passes WCAG AA for body text); on black it is 1.48:1 (fails). For text placed on #04029A, use white for the best readability.

What is the closest Tailwind color to #04029A?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #04029A?

#04029A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #999C02. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #04029A below.

Is #04029A good for buttons?

#04029A works well for buttons and highlights, but use white text on #04029A — black text only reaches 1.48:1, below the 4.5:1 needed for normal-size labels.

Is #04029A the same as CSS darkblue?

No — #04029A is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#04029A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04029A

Not just a swatch — here's how #04029A works with other colors. Named schemes with #04029A in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #04029A Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F4ECE3

Dark Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Tech Product Signal · 5 colors

Signal #04029A Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1A41B7

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

Moody Editorial Color · 5 colors

Color #04029A Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #160053

Dark Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Dark Blue.

Coastal Morning Lead · 5 colors

Lead #04029A Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Dark Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #04029A Secondary #415580 Support #9D8F88 Ink #18140F

Dark Blue 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 Dark Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #04029A 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 9/100

Cool

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

Softness 20/100

Very low

Firm and assertive — carries weight and contrast.

Depth 74/100

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 13/100

Very low

Clean and current — no dusty, aged cast.

Luxury 65/100

High

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

Brand distinctiveness 82/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 20/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 61/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #04029A

For UI

For branding

For interior

For fashion

People also use #04029A with

True Blue Indigo Olive 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 14.2:1. Use

Subtle surface Use #C4C3F4 for cards and hover fills. Tint 80

Avoid beside #38029C — 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 #04029A 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: #04029A;
  --color-base-rgb: 4 2 154;
  --color-base-oklch: oklch(31.3% 0.213 264.9);
  --color-50: #F1F0FE;
  --color-100: #D8D8FD;
  --color-200: #B2B1FC;
  --color-300: #7B79F6;
  --color-400: #4B49E9;
  --color-500: #2825D0;
  --color-600: #27259D;
  --color-700: #22206F;
  --color-800: #1A1948;
  --color-900: #12112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-blue: {
    50: '#F1F0FE',
    100: '#D8D8FD',
    200: '#B2B1FC',
    300: '#7B79F6',
    400: '#4B49E9',
    500: '#2825D0',
    600: '#27259D',
    700: '#22206F',
    800: '#1A1948',
    900: '#12112C',
  },
}

$base: #04029A;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #D8D8FD;
$base-200: #B2B1FC;
$base-300: #7B79F6;
$base-400: #4B49E9;
$base-500: #2825D0;
$base-600: #27259D;
$base-700: #22206F;
$base-800: #1A1948;
$base-900: #12112C;
$base-hover: #04027D;
$base-subtle: #A5A3F1;

{
    "color": {
        "base": {
            "value": "#04029A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D8D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B2B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7B79F6",
                "type": "color"
            },
            "400": {
                "value": "#4B49E9",
                "type": "color"
            },
            "500": {
                "value": "#2825D0",
                "type": "color"
            },
            "600": {
                "value": "#27259D",
                "type": "color"
            },
            "700": {
                "value": "#22206F",
                "type": "color"
            },
            "800": {
                "value": "#1A1948",
                "type": "color"
            },
            "900": {
                "value": "#12112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #04029A

Color Lab

Pairs with #04029A

UI roles & guardrails

In real applications

Scales

Every model

Export