What color is #043E4E?

#043E4E is a very dark, vivid cyan. In RGB it is rgb(4, 62, 78), and in HSL hsl(193, 90%, 16%).

Is #043E4E accessible as text?

On white, #043E4E has a contrast ratio of 11.64:1 (passes WCAG AA for body text); on black it is 1.80:1 (fails). For text placed on #043E4E, use white for the best readability.

What is the closest Tailwind color to #043E4E?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #043E4E?

#043E4E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4E1404. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #043E4E below.

Is #043E4E good for buttons?

#043E4E works well for buttons and highlights, but use white text on #043E4E — black text only reaches 1.80:1, below the 4.5:1 needed for normal-size labels.

Is #043E4E the same as CSS darkslategray?

No — #043E4E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#043E4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #043E4E

Not just a swatch — here's how #043E4E works with other colors. Named schemes with #043E4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #043E4E Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E354A

Prussian 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 #043E4E Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

Prussian 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 #043E4E Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #325E6E

Prussian 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 Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #043E4E Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233E

Prussian 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 #043E4E Secondary #516066 Support #969386 Ink #16140F

Prussian 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #043E4E 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 32/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 23/100

Low

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

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 45/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #043E4E

For UI

For branding

For interior

For fashion

People also use #043E4E with

Pine Green Navy Oxblood Platinum Dark Slate Gray

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 11.6:1. Use

Subtle surface Use #B8E4F0 for cards and hover fills. Tint 80

Avoid beside #04254E — 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 #043E4E 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: #043E4E;
  --color-base-rgb: 4 62 78;
  --color-base-oklch: oklch(33.8% 0.061 222.6);
  --color-50: #F0FBFE;
  --color-100: #D8F5FD;
  --color-200: #B2EBFB;
  --color-300: #7ED9F2;
  --color-400: #4FC3E3;
  --color-500: #2BA7CA;
  --color-600: #298199;
  --color-700: #235C6C;
  --color-800: #1B3D46;
  --color-900: #12262B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0FBFE',
    100: '#D8F5FD',
    200: '#B2EBFB',
    300: '#7ED9F2',
    400: '#4FC3E3',
    500: '#2BA7CA',
    600: '#298199',
    700: '#235C6C',
    800: '#1B3D46',
    900: '#12262B',
  },
}

$base: #043E4E;
$base-ink: #FFFFFF;
$base-50: #F0FBFE;
$base-100: #D8F5FD;
$base-200: #B2EBFB;
$base-300: #7ED9F2;
$base-400: #4FC3E3;
$base-500: #2BA7CA;
$base-600: #298199;
$base-700: #235C6C;
$base-800: #1B3D46;
$base-900: #12262B;
$base-hover: #03313E;
$base-subtle: #93D8EB;

{
    "color": {
        "base": {
            "value": "#043E4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FBFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F5FD",
                "type": "color"
            },
            "200": {
                "value": "#B2EBFB",
                "type": "color"
            },
            "300": {
                "value": "#7ED9F2",
                "type": "color"
            },
            "400": {
                "value": "#4FC3E3",
                "type": "color"
            },
            "500": {
                "value": "#2BA7CA",
                "type": "color"
            },
            "600": {
                "value": "#298199",
                "type": "color"
            },
            "700": {
                "value": "#235C6C",
                "type": "color"
            },
            "800": {
                "value": "#1B3D46",
                "type": "color"
            },
            "900": {
                "value": "#12262B",
                "type": "color"
            }
        }
    }
}