What color is #04428F?

#04428F is a dark, vivid blue. In RGB it is rgb(4, 66, 143), and in HSL hsl(213, 95%, 29%).

Is #04428F accessible as text?

On white, #04428F has a contrast ratio of 9.63:1 (passes WCAG AA for body text); on black it is 2.18:1 (fails). For text placed on #04428F, use white for the best readability.

What is the closest Tailwind color to #04428F?

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

What colors go well with #04428F?

#04428F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #905104. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #04428F below.

Is #04428F good for buttons?

#04428F works well for buttons and highlights, but use white text on #04428F — black text only reaches 2.18:1, below the 4.5:1 needed for normal-size labels.

Is #04428F the same as CSS darkslateblue?

No — #04428F is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#04428F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04428F

Not just a swatch — here's how #04428F works with other colors. Named schemes with #04428F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #04428F 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 #04428F Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3566AE

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 #04428F Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223B

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 #04428F Surface #EDE9D6 Anchor #5A2144 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 #04428F Secondary #5B6E8A 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 #04428F 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 13/100

Cool

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 62/100

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 34/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 73/100

High

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

Surface fit 17/100

Very low

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

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #04428F

For UI

For branding

For interior

For fashion

People also use #04428F 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 9.6:1. Use

Subtle surface Use #C2D8F4 for cards and hover fills. Tint 80

Avoid beside #041490 — 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 #04428F 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: #04428F;
  --color-base-rgb: 4 66 143;
  --color-base-oklch: oklch(39.4% 0.140 257.7);
  --color-50: #F0F7FE;
  --color-100: #D8E9FD;
  --color-200: #B1D2FC;
  --color-300: #7AB1F5;
  --color-400: #4A91E8;
  --color-500: #2772CE;
  --color-600: #265B9C;
  --color-700: #21446E;
  --color-800: #1A2E47;
  --color-900: #121D2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0F7FE',
    100: '#D8E9FD',
    200: '#B1D2FC',
    300: '#7AB1F5',
    400: '#4A91E8',
    500: '#2772CE',
    600: '#265B9C',
    700: '#21446E',
    800: '#1A2E47',
    900: '#121D2B',
  },
}

$base: #04428F;
$base-ink: #FFFFFF;
$base-50: #F0F7FE;
$base-100: #D8E9FD;
$base-200: #B1D2FC;
$base-300: #7AB1F5;
$base-400: #4A91E8;
$base-500: #2772CE;
$base-600: #265B9C;
$base-700: #21446E;
$base-800: #1A2E47;
$base-900: #121D2B;
$base-hover: #033673;
$base-subtle: #A1C5F0;

{
    "color": {
        "base": {
            "value": "#04428F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F7FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E9FD",
                "type": "color"
            },
            "200": {
                "value": "#B1D2FC",
                "type": "color"
            },
            "300": {
                "value": "#7AB1F5",
                "type": "color"
            },
            "400": {
                "value": "#4A91E8",
                "type": "color"
            },
            "500": {
                "value": "#2772CE",
                "type": "color"
            },
            "600": {
                "value": "#265B9C",
                "type": "color"
            },
            "700": {
                "value": "#21446E",
                "type": "color"
            },
            "800": {
                "value": "#1A2E47",
                "type": "color"
            },
            "900": {
                "value": "#121D2B",
                "type": "color"
            }
        }
    }
}

Palettes built on #04428F

Color Lab

Pairs with #04428F

UI roles & guardrails

In real applications

Scales

Every model

Export