What color is #040EC4?

#040EC4 is a dark, vivid blue. In RGB it is rgb(4, 14, 196), and in HSL hsl(237, 96%, 39%).

Is #040EC4 accessible as text?

On white, #040EC4 has a contrast ratio of 11.26:1 (passes WCAG AA for body text); on black it is 1.87:1 (fails). For text placed on #040EC4, use white for the best readability.

What is the closest Tailwind color to #040EC4?

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

What colors go well with #040EC4?

#040EC4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C3B904. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040EC4 below.

Is #040EC4 good for buttons?

#040EC4 works well for buttons and highlights, but use white text on #040EC4 — black text only reaches 1.87:1, below the 4.5:1 needed for normal-size labels.

Is #040EC4 the same as CSS mediumblue?

No — #040EC4 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#040EC4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040EC4

Not just a swatch — here's how #040EC4 works with other colors. Named schemes with #040EC4 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #040EC4 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 #040EC4 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1E4FE1

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 #040EC4 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #240073

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 #040EC4 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 #040EC4 Secondary #4F679B 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.

Build a working theme in the generator →

Color Lab

How #040EC4 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 69/100

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 6/100

Very low

Clean and current — no dusty, aged cast.

Luxury 56/100

Moderate

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

Brand distinctiveness 97/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 54/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #040EC4

For UI

For branding

For interior

For fashion

People also use #040EC4 with

Dodger 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 11.3:1. Use

Subtle surface Use #CACDF5 for cards and hover fills. Tint 80

Avoid beside #3A04C3 — 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 #040EC4 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: #040EC4;
  --color-base-rgb: 4 14 196;
  --color-base-oklch: oklch(37.8% 0.252 264.6);
  --color-50: #F0F1FE;
  --color-100: #D8DAFD;
  --color-200: #B1B4FC;
  --color-300: #7A80F6;
  --color-400: #4A51E8;
  --color-500: #262ECF;
  --color-600: #252B9D;
  --color-700: #21256E;
  --color-800: #191C48;
  --color-900: #12132C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  medium-blue: {
    50: '#F0F1FE',
    100: '#D8DAFD',
    200: '#B1B4FC',
    300: '#7A80F6',
    400: '#4A51E8',
    500: '#262ECF',
    600: '#252B9D',
    700: '#21256E',
    800: '#191C48',
    900: '#12132C',
  },
}

$base: #040EC4;
$base-ink: #FFFFFF;
$base-50: #F0F1FE;
$base-100: #D8DAFD;
$base-200: #B1B4FC;
$base-300: #7A80F6;
$base-400: #4A51E8;
$base-500: #262ECF;
$base-600: #252B9D;
$base-700: #21256E;
$base-800: #191C48;
$base-900: #12132C;
$base-hover: #030B9C;
$base-subtle: #AEB2F2;

{
    "color": {
        "base": {
            "value": "#040EC4",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F1FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DAFD",
                "type": "color"
            },
            "200": {
                "value": "#B1B4FC",
                "type": "color"
            },
            "300": {
                "value": "#7A80F6",
                "type": "color"
            },
            "400": {
                "value": "#4A51E8",
                "type": "color"
            },
            "500": {
                "value": "#262ECF",
                "type": "color"
            },
            "600": {
                "value": "#252B9D",
                "type": "color"
            },
            "700": {
                "value": "#21256E",
                "type": "color"
            },
            "800": {
                "value": "#191C48",
                "type": "color"
            },
            "900": {
                "value": "#12132C",
                "type": "color"
            }
        }
    }
}

Palettes built on #040EC4

Color Lab

Pairs with #040EC4

UI roles & guardrails

In real applications

Scales

Every model

Export