What color is #03009E?

#03009E is a dark, vivid blue. In RGB it is rgb(3, 0, 158), and in HSL hsl(241, 100%, 31%).

Is #03009E accessible as text?

On white, #03009E has a contrast ratio of 14.02:1 (passes WCAG AA for body text); on black it is 1.50:1 (fails). For text placed on #03009E, use white for the best readability.

What is the closest Tailwind color to #03009E?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #03009E?

#03009E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9B9E00. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03009E below.

Is #03009E good for buttons?

#03009E works well for buttons and highlights, but use white text on #03009E — black text only reaches 1.50:1, below the 4.5:1 needed for normal-size labels.

Is #03009E the same as CSS darkblue?

No — #03009E is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#03009E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03009E

Not just a swatch — here's how #03009E works with other colors. Named schemes with #03009E in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #03009E Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F4ECE3

Zaffre 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.

Tech Product Signal · 5 colors

Signal #03009E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1841BB

Zaffre is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Zaffre.

Moody Editorial Color · 5 colors

Color #03009E Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #170056

Zaffre 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 Zaffre.

Coastal Morning Lead · 5 colors

Lead #03009E Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #03009E Secondary #425682 Support #9D8F88 Ink #18140F

Zaffre 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 Zaffre carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #03009E 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 9/100

Cool

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

Softness 20/100

Very low

Firm and assertive — carries weight and contrast.

Depth 74/100

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 12/100

Very low

Clean and current — no dusty, aged cast.

Luxury 64/100

High

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

Brand distinctiveness 84/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 19/100

Very low

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

Print safety 60/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #03009E

For UI

For branding

For interior

For fashion

People also use #03009E with

True Blue Indigo Olive Gainsboro Prussian Blue

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 14.0:1. Use

Subtle surface Use #C3C2F5 for cards and hover fills. Tint 80

Avoid beside #37009E — 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 #03009E 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: #03009E;
  --color-base-rgb: 3 0 158;
  --color-base-oklch: oklch(31.7% 0.218 264.6);
  --color-50: #F1F0FE;
  --color-100: #D8D8FD;
  --color-200: #B2B1FC;
  --color-300: #7977F8;
  --color-400: #4946EC;
  --color-500: #2522D2;
  --color-600: #25239F;
  --color-700: #201F70;
  --color-800: #191848;
  --color-900: #12112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F1F0FE',
    100: '#D8D8FD',
    200: '#B2B1FC',
    300: '#7977F8',
    400: '#4946EC',
    500: '#2522D2',
    600: '#25239F',
    700: '#201F70',
    800: '#191848',
    900: '#12112C',
  },
}

$base: #03009E;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #D8D8FD;
$base-200: #B2B1FC;
$base-300: #7977F8;
$base-400: #4946EC;
$base-500: #2522D2;
$base-600: #25239F;
$base-700: #201F70;
$base-800: #191848;
$base-900: #12112C;
$base-hover: #02007E;
$base-subtle: #A3A2F2;

{
    "color": {
        "base": {
            "value": "#03009E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D8D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B2B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7977F8",
                "type": "color"
            },
            "400": {
                "value": "#4946EC",
                "type": "color"
            },
            "500": {
                "value": "#2522D2",
                "type": "color"
            },
            "600": {
                "value": "#25239F",
                "type": "color"
            },
            "700": {
                "value": "#201F70",
                "type": "color"
            },
            "800": {
                "value": "#191848",
                "type": "color"
            },
            "900": {
                "value": "#12112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #03009E

Color Lab

Pairs with #03009E

UI roles & guardrails

In real applications

Scales

Every model

Export