What color is #003371?

#003371 is a dark, vivid blue. In RGB it is rgb(0, 51, 113), and in HSL hsl(213, 100%, 22%).

Is #003371 accessible as text?

On white, #003371 has a contrast ratio of 12.27:1 (passes WCAG AA for body text); on black it is 1.71:1 (fails). For text placed on #003371, use white for the best readability.

What is the closest Tailwind color to #003371?

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

What colors go well with #003371?

#003371 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #703E00. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #003371 below.

Is #003371 good for buttons?

#003371 works well for buttons and highlights, but use white text on #003371 — black text only reaches 1.71:1, below the 4.5:1 needed for normal-size labels.

Is #003371 the same as CSS midnightblue?

No — #003371 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#003371 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #003371

Not just a swatch — here's how #003371 works with other colors. Named schemes with #003371 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #003371 Anchor #141210 Accent #AEAE53 Secondary #232933 Surface #F0EEE3

Yale Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #003371 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #10123E

Yale Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Yale Blue.

Coastal Morning Lead · 5 colors

Lead #003371 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Vintage Leather Lead · 5 colors

Lead #003371 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223B

Yale 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 #003371 Secondary #4D5D73 Support #9D8F89 Ink #16140F

Yale 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 Yale Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #003371 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 19/100

Cool

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

Softness 28/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

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 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 72/100

High

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

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 50/100

Moderate

Workable accent with care around contrast.

Surface fit 27/100

Low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #003371

For UI

For branding

For interior

For fashion

People also use #003371 with

Persian Green Navy Blue Sepia 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 12.3:1. Use

Subtle surface Use #BBD4F4 for cards and hover fills. Tint 80

Avoid beside #000D70 — 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 #003371 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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: #003371;
  --color-base-rgb: 0 51 113;
  --color-base-oklch: oklch(33.3% 0.118 257.1);
  --color-50: #F0F7FE;
  --color-100: #D8E9FD;
  --color-200: #B1D2FC;
  --color-300: #77B1F8;
  --color-400: #4691EC;
  --color-500: #2272D2;
  --color-600: #235B9F;
  --color-700: #1F4370;
  --color-800: #182E48;
  --color-900: #111D2C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F0F7FE',
    100: '#D8E9FD',
    200: '#B1D2FC',
    300: '#77B1F8',
    400: '#4691EC',
    500: '#2272D2',
    600: '#235B9F',
    700: '#1F4370',
    800: '#182E48',
    900: '#111D2C',
  },
}

$base: #003371;
$base-ink: #FFFFFF;
$base-50: #F0F7FE;
$base-100: #D8E9FD;
$base-200: #B1D2FC;
$base-300: #77B1F8;
$base-400: #4691EC;
$base-500: #2272D2;
$base-600: #235B9F;
$base-700: #1F4370;
$base-800: #182E48;
$base-900: #111D2C;
$base-hover: #00285A;
$base-subtle: #96BFF1;

{
    "color": {
        "base": {
            "value": "#003371",
            "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": "#77B1F8",
                "type": "color"
            },
            "400": {
                "value": "#4691EC",
                "type": "color"
            },
            "500": {
                "value": "#2272D2",
                "type": "color"
            },
            "600": {
                "value": "#235B9F",
                "type": "color"
            },
            "700": {
                "value": "#1F4370",
                "type": "color"
            },
            "800": {
                "value": "#182E48",
                "type": "color"
            },
            "900": {
                "value": "#111D2C",
                "type": "color"
            }
        }
    }
}

Palettes built on #003371

Color Lab

Pairs with #003371

UI roles & guardrails

In real applications

Scales

Every model

Export