What color is #04478E?

#04478E is a dark, vivid blue. In RGB it is rgb(4, 71, 142), and in HSL hsl(211, 95%, 29%).

Is #04478E accessible as text?

On white, #04478E has a contrast ratio of 9.14:1 (passes WCAG AA for body text); on black it is 2.30:1 (fails). For text placed on #04478E, use white for the best readability.

What is the closest Tailwind color to #04478E?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #04478E?

#04478E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #904C04. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #04478E below.

Is #04478E good for buttons?

#04478E works well for buttons and highlights, but use white text on #04478E — black text only reaches 2.30:1, below the 4.5:1 needed for normal-size labels.

Is #04478E the same as CSS darkslateblue?

No — #04478E is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#04478E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04478E

Not just a swatch — here's how #04478E works with other colors. Named schemes with #04478E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #04478E Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #04478E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #376BAD

Classic 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 Classic Blue.

Vintage Leather Lead · 5 colors

Lead #04478E Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

Classic Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #04478E Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CA Secondary #322B2F

Classic Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #04478E Secondary #5E728B Support #9D8F89 Ink #16140F

Classic 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #04478E 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 14/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 37/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 36/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 76/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 18/100

Very low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #04478E

For UI

For branding

For interior

For fashion

People also use #04478E with

Tiffany Blue Phthalo Blue Russet 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 9.1:1. Use

Subtle surface Use #C2DAF4 for cards and hover fills. Tint 80

Avoid beside #041990 — 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 #04478E at work across the surfaces designers actually ship.

Website / UI

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Build faster.

A working theme, generated in seconds.

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: #04478E;
  --color-base-rgb: 4 71 142;
  --color-base-oklch: oklch(40.5% 0.132 255.5);
  --color-50: #F0F7FE;
  --color-100: #D8EAFD;
  --color-200: #B1D5FC;
  --color-300: #7AB6F5;
  --color-400: #4A96E8;
  --color-500: #2778CE;
  --color-600: #265F9C;
  --color-700: #21466E;
  --color-800: #1A3047;
  --color-900: #121E2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0F7FE',
    100: '#D8EAFD',
    200: '#B1D5FC',
    300: '#7AB6F5',
    400: '#4A96E8',
    500: '#2778CE',
    600: '#265F9C',
    700: '#21466E',
    800: '#1A3047',
    900: '#121E2B',
  },
}

$base: #04478E;
$base-ink: #FFFFFF;
$base-50: #F0F7FE;
$base-100: #D8EAFD;
$base-200: #B1D5FC;
$base-300: #7AB6F5;
$base-400: #4A96E8;
$base-500: #2778CE;
$base-600: #265F9C;
$base-700: #21466E;
$base-800: #1A3047;
$base-900: #121E2B;
$base-hover: #033973;
$base-subtle: #A1C7F0;

{
    "color": {
        "base": {
            "value": "#04478E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F7FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EAFD",
                "type": "color"
            },
            "200": {
                "value": "#B1D5FC",
                "type": "color"
            },
            "300": {
                "value": "#7AB6F5",
                "type": "color"
            },
            "400": {
                "value": "#4A96E8",
                "type": "color"
            },
            "500": {
                "value": "#2778CE",
                "type": "color"
            },
            "600": {
                "value": "#265F9C",
                "type": "color"
            },
            "700": {
                "value": "#21466E",
                "type": "color"
            },
            "800": {
                "value": "#1A3047",
                "type": "color"
            },
            "900": {
                "value": "#121E2B",
                "type": "color"
            }
        }
    }
}

Palettes built on #04478E

Color Lab

Pairs with #04478E

UI roles & guardrails

In real applications

Scales

Every model

Export