What color is #182DA4?

#182DA4 is a dark, vivid blue. In RGB it is rgb(24, 45, 164), and in HSL hsl(231, 74%, 37%).

Is #182DA4 accessible as text?

On white, #182DA4 has a contrast ratio of 10.77:1 (passes WCAG AA for body text); on black it is 1.95:1 (fails). For text placed on #182DA4, use white for the best readability.

What is the closest Tailwind color to #182DA4?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #182DA4?

#182DA4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A48F19. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #182DA4 below.

Is #182DA4 good for buttons?

#182DA4 works well for buttons and highlights, but use white text on #182DA4 — black text only reaches 1.95:1, below the 4.5:1 needed for normal-size labels.

Is #182DA4 the same as CSS mediumblue?

No — #182DA4 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#182DA4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #182DA4

Not just a swatch — here's how #182DA4 works with other colors. Named schemes with #182DA4 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #182DA4 Anchor #141210 Accent #DD965A Secondary #242933 Surface #F4ECE3

Klein 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 #182DA4 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3758C2

Klein 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 Klein Blue.

Moody Editorial Color · 5 colors

Color #182DA4 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #230B5F

Klein 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 Klein Blue.

Coastal Morning Lead · 5 colors

Lead #182DA4 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Klein 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 #182DA4 Secondary #57678F Support #9D8F88 Ink #18140F

Klein 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 Klein Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #182DA4 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 10/100

Cool

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

Softness 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 62/100

High

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

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 61/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 15/100

Very low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #182DA4

For UI

For branding

For interior

For fashion

People also use #182DA4 with

Bondi Blue Rebecca Purple Dark Goldenrod 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 10.8:1. Use

Subtle surface Use #CED3F0 for cards and hover fills. Tint 80

Avoid beside #3219A4 — 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 #182DA4 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: #182DA4;
  --color-base-rgb: 24 45 164;
  --color-base-oklch: oklch(37.8% 0.190 267.1);
  --color-50: #F1F3FE;
  --color-100: #DBDFFB;
  --color-200: #B8C1F4;
  --color-300: #8896E7;
  --color-400: #5C6ED6;
  --color-500: #394DBC;
  --color-600: #33418F;
  --color-700: #2A3265;
  --color-800: #1F2442;
  --color-900: #151829;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  klein-blue: {
    50: '#F1F3FE',
    100: '#DBDFFB',
    200: '#B8C1F4',
    300: '#8896E7',
    400: '#5C6ED6',
    500: '#394DBC',
    600: '#33418F',
    700: '#2A3265',
    800: '#1F2442',
    900: '#151829',
  },
}

$base: #182DA4;
$base-ink: #FFFFFF;
$base-50: #F1F3FE;
$base-100: #DBDFFB;
$base-200: #B8C1F4;
$base-300: #8896E7;
$base-400: #5C6ED6;
$base-500: #394DBC;
$base-600: #33418F;
$base-700: #2A3265;
$base-800: #1F2442;
$base-900: #151829;
$base-hover: #142483;
$base-subtle: #B4BCEA;

{
    "color": {
        "base": {
            "value": "#182DA4",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F3FE",
                "type": "color"
            },
            "100": {
                "value": "#DBDFFB",
                "type": "color"
            },
            "200": {
                "value": "#B8C1F4",
                "type": "color"
            },
            "300": {
                "value": "#8896E7",
                "type": "color"
            },
            "400": {
                "value": "#5C6ED6",
                "type": "color"
            },
            "500": {
                "value": "#394DBC",
                "type": "color"
            },
            "600": {
                "value": "#33418F",
                "type": "color"
            },
            "700": {
                "value": "#2A3265",
                "type": "color"
            },
            "800": {
                "value": "#1F2442",
                "type": "color"
            },
            "900": {
                "value": "#151829",
                "type": "color"
            }
        }
    }
}

Palettes built on #182DA4

Color Lab

Pairs with #182DA4

UI roles & guardrails

In real applications

Scales

Every model

Export