What color is #004E73?

#004E73 is a dark, vivid cyan-blue. In RGB it is rgb(0, 78, 115), and in HSL hsl(199, 100%, 23%).

Is #004E73 accessible as text?

On white, #004E73 has a contrast ratio of 8.98:1 (passes WCAG AA for body text); on black it is 2.34:1 (fails). For text placed on #004E73, use white for the best readability.

What is the closest Tailwind color to #004E73?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #004E73?

#004E73 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #752500. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #004E73 below.

Is #004E73 good for buttons?

#004E73 works well for buttons and highlights, but use white text on #004E73 — black text only reaches 2.34:1, below the 4.5:1 needed for normal-size labels.

Is #004E73 the same as CSS darkslategray?

No — #004E73 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#004E73 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #004E73

Not just a swatch — here's how #004E73 works with other colors. Named schemes with #004E73 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #004E73 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Classic Blue 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 #004E73 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Classic Blue 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 #004E73 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #387093

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 #004E73 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #004E73 Secondary #5F7280 Support #969386 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 #004E73 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 24/100

Cool

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 47/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 24/100

Low

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

UI accent fit 68/100

High

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

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 78/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #004E73

For UI

For branding

For interior

For fashion

People also use #004E73 with

Shamrock Green Navy Blue Espresso Platinum 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 9.0:1. Use

Subtle surface Use #BBE2F4 for cards and hover fills. Tint 80

Avoid beside #002975 — 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 #004E73 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: #004E73;
  --color-base-rgb: 0 78 115;
  --color-base-oklch: oklch(40.3% 0.090 238.4);
  --color-50: #F0FAFE;
  --color-100: #D8F1FD;
  --color-200: #B1E4FC;
  --color-300: #77CFF8;
  --color-400: #46B7EC;
  --color-500: #229BD2;
  --color-600: #23789F;
  --color-700: #1F5670;
  --color-800: #183948;
  --color-900: #11242C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0FAFE',
    100: '#D8F1FD',
    200: '#B1E4FC',
    300: '#77CFF8',
    400: '#46B7EC',
    500: '#229BD2',
    600: '#23789F',
    700: '#1F5670',
    800: '#183948',
    900: '#11242C',
  },
}

$base: #004E73;
$base-ink: #FFFFFF;
$base-50: #F0FAFE;
$base-100: #D8F1FD;
$base-200: #B1E4FC;
$base-300: #77CFF8;
$base-400: #46B7EC;
$base-500: #229BD2;
$base-600: #23789F;
$base-700: #1F5670;
$base-800: #183948;
$base-900: #11242C;
$base-hover: #00405E;
$base-subtle: #97D5F1;

{
    "color": {
        "base": {
            "value": "#004E73",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FAFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F1FD",
                "type": "color"
            },
            "200": {
                "value": "#B1E4FC",
                "type": "color"
            },
            "300": {
                "value": "#77CFF8",
                "type": "color"
            },
            "400": {
                "value": "#46B7EC",
                "type": "color"
            },
            "500": {
                "value": "#229BD2",
                "type": "color"
            },
            "600": {
                "value": "#23789F",
                "type": "color"
            },
            "700": {
                "value": "#1F5670",
                "type": "color"
            },
            "800": {
                "value": "#183948",
                "type": "color"
            },
            "900": {
                "value": "#11242C",
                "type": "color"
            }
        }
    }
}

Palettes built on #004E73

Color Lab

Pairs with #004E73

UI roles & guardrails

In real applications

Scales

Every model

Export