What color is #003347?

#003347 is a very dark, vivid cyan-blue. In RGB it is rgb(0, 51, 71), and in HSL hsl(197, 100%, 14%).

Is #003347 accessible as text?

On white, #003347 has a contrast ratio of 13.42:1 (passes WCAG AA for body text); on black it is 1.56:1 (fails). For text placed on #003347, use white for the best readability.

What is the closest Tailwind color to #003347?

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

What colors go well with #003347?

#003347 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #471400. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #003347 below.

Is #003347 good for buttons?

#003347 works well for buttons and highlights, but use white text on #003347 — black text only reaches 1.56:1, below the 4.5:1 needed for normal-size labels.

Is #003347 the same as CSS midnightblue?

No — #003347 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#003347 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #003347

Not just a swatch — here's how #003347 works with other colors. Named schemes with #003347 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #003347 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #003347 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 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 #003347 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2C5366

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 #003347 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

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 #003347 Secondary #47555D 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 #003347 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 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

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 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

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 31/100

Low

Workable accent with care around contrast.

Surface fit 47/100

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 #003347

For UI

For branding

For interior

For fashion

People also use #003347 with

Pine Green Navy Oxblood 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 13.4:1. Use

Subtle surface Use #B4E1F3 for cards and hover fills. Tint 80

Avoid beside #001B47 — 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 #003347 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: #003347;
  --color-base-rgb: 0 51 71;
  --color-base-oklch: oklch(30.1% 0.061 231.2);
  --color-50: #F0FAFE;
  --color-100: #D8F3FD;
  --color-200: #B1E6FC;
  --color-300: #77D4F8;
  --color-400: #46BDEC;
  --color-500: #22A1D2;
  --color-600: #237C9F;
  --color-700: #1F5970;
  --color-800: #183B48;
  --color-900: #11242C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0FAFE',
    100: '#D8F3FD',
    200: '#B1E6FC',
    300: '#77D4F8',
    400: '#46BDEC',
    500: '#22A1D2',
    600: '#237C9F',
    700: '#1F5970',
    800: '#183B48',
    900: '#11242C',
  },
}

$base: #003347;
$base-ink: #FFFFFF;
$base-50: #F0FAFE;
$base-100: #D8F3FD;
$base-200: #B1E6FC;
$base-300: #77D4F8;
$base-400: #46BDEC;
$base-500: #22A1D2;
$base-600: #237C9F;
$base-700: #1F5970;
$base-800: #183B48;
$base-900: #11242C;
$base-hover: #002939;
$base-subtle: #8BD3EF;

{
    "color": {
        "base": {
            "value": "#003347",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FAFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F3FD",
                "type": "color"
            },
            "200": {
                "value": "#B1E6FC",
                "type": "color"
            },
            "300": {
                "value": "#77D4F8",
                "type": "color"
            },
            "400": {
                "value": "#46BDEC",
                "type": "color"
            },
            "500": {
                "value": "#22A1D2",
                "type": "color"
            },
            "600": {
                "value": "#237C9F",
                "type": "color"
            },
            "700": {
                "value": "#1F5970",
                "type": "color"
            },
            "800": {
                "value": "#183B48",
                "type": "color"
            },
            "900": {
                "value": "#11242C",
                "type": "color"
            }
        }
    }
}