What color is #0404BC?

#0404BC is a dark, vivid blue. In RGB it is rgb(4, 4, 188), and in HSL hsl(240, 96%, 38%).

Is #0404BC accessible as text?

On white, #0404BC has a contrast ratio of 12.01:1 (passes WCAG AA for body text); on black it is 1.75:1 (fails). For text placed on #0404BC, use white for the best readability.

What is the closest Tailwind color to #0404BC?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #0404BC?

#0404BC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BEBE04. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0404BC below.

Is #0404BC good for buttons?

#0404BC works well for buttons and highlights, but use white text on #0404BC — black text only reaches 1.75:1, below the 4.5:1 needed for normal-size labels.

Is #0404BC the same as CSS mediumblue?

No — #0404BC is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#0404BC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0404BC

Not just a swatch — here's how #0404BC works with other colors. Named schemes with #0404BC in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #0404BC Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F4ECE3

Medium 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.

Tech Product Signal · 5 colors

Signal #0404BC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1B4BD9

Medium 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 Medium Blue.

Moody Editorial Color · 5 colors

Color #0404BC Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #20006D

Medium 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 Medium Blue.

Coastal Morning Lead · 5 colors

Lead #0404BC Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Medium Blue 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 #0404BC Secondary #4B6395 Support #9D8F88 Ink #18140F

Medium 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 Medium Blue carrying the quiet middle.

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Color Lab

How #0404BC 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

Low

Firm and assertive — carries weight and contrast.

Depth 71/100

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 7/100

Very low

Clean and current — no dusty, aged cast.

Luxury 58/100

Moderate

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

Brand distinctiveness 95/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 39/100

Low

Workable accent with care around contrast.

Surface fit 16/100

Very low

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

Print safety 55/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #0404BC

For UI

For branding

For interior

For fashion

People also use #0404BC with

Signal Blue Grape Citron 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 12.0:1. Use

Subtle surface Use #CACAF5 for cards and hover fills. Tint 80

Avoid beside #4204BE — 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 #0404BC 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: #0404BC;
  --color-base-rgb: 4 4 188;
  --color-base-oklch: oklch(36.2% 0.247 264.6);
  --color-50: #F0F0FE;
  --color-100: #D8D8FD;
  --color-200: #B1B1FC;
  --color-300: #7A7AF6;
  --color-400: #4A4AE8;
  --color-500: #2626CF;
  --color-600: #25259D;
  --color-700: #21216E;
  --color-800: #191948;
  --color-900: #12122C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  medium-blue: {
    50: '#F0F0FE',
    100: '#D8D8FD',
    200: '#B1B1FC',
    300: '#7A7AF6',
    400: '#4A4AE8',
    500: '#2626CF',
    600: '#25259D',
    700: '#21216E',
    800: '#191948',
    900: '#12122C',
  },
}

$base: #0404BC;
$base-ink: #FFFFFF;
$base-50: #F0F0FE;
$base-100: #D8D8FD;
$base-200: #B1B1FC;
$base-300: #7A7AF6;
$base-400: #4A4AE8;
$base-500: #2626CF;
$base-600: #25259D;
$base-700: #21216E;
$base-800: #191948;
$base-900: #12122C;
$base-hover: #030398;
$base-subtle: #ADADF2;

{
    "color": {
        "base": {
            "value": "#0404BC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D8D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B1B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7A7AF6",
                "type": "color"
            },
            "400": {
                "value": "#4A4AE8",
                "type": "color"
            },
            "500": {
                "value": "#2626CF",
                "type": "color"
            },
            "600": {
                "value": "#25259D",
                "type": "color"
            },
            "700": {
                "value": "#21216E",
                "type": "color"
            },
            "800": {
                "value": "#191948",
                "type": "color"
            },
            "900": {
                "value": "#12122C",
                "type": "color"
            }
        }
    }
}

Palettes built on #0404BC

Color Lab

Pairs with #0404BC

UI roles & guardrails

In real applications

Scales

Every model

Export