What color is #181E8A?

#181E8A is a dark, vivid blue. In RGB it is rgb(24, 30, 138), and in HSL hsl(237, 70%, 32%).

Is #181E8A accessible as text?

On white, #181E8A has a contrast ratio of 13.19:1 (passes WCAG AA for body text); on black it is 1.59:1 (fails). For text placed on #181E8A, use white for the best readability.

What is the closest Tailwind color to #181E8A?

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

What colors go well with #181E8A?

#181E8A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8B8518. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #181E8A below.

Is #181E8A good for buttons?

#181E8A works well for buttons and highlights, but use white text on #181E8A — black text only reaches 1.59:1, below the 4.5:1 needed for normal-size labels.

Is #181E8A the same as CSS midnightblue?

No — #181E8A is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#181E8A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #181E8A

Not just a swatch — here's how #181E8A works with other colors. Named schemes with #181E8A in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #181E8A Anchor #141210 Accent #DC9659 Secondary #252933 Surface #F4ECE3

Phthalo 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 #181E8A Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1A0049

Phthalo 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 Phthalo Blue.

Coastal Morning Lead · 5 colors

Lead #181E8A Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Phthalo 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 #181E8A Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Phthalo 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 #F8F4EF Accent #181E8A Secondary #4C587C Support #9D8F88 Ink #18140F

Phthalo 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 Phthalo Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #181E8A 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 12/100

Cool

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

Softness 24/100

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 23/100

Low

Clean and current — no dusty, aged cast.

Luxury 67/100

High

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

Brand distinctiveness 67/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 46/100

Moderate

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 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #181E8A

For UI

For branding

For interior

For fashion

People also use #181E8A with

Steel 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 13.2:1. Use

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

Avoid beside #39188B — 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 #181E8A 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: #181E8A;
  --color-base-rgb: 24 30 138;
  --color-base-oklch: oklch(32.5% 0.172 269.6);
  --color-50: #F1F2FD;
  --color-100: #DBDDFA;
  --color-200: #BABDF3;
  --color-300: #8A8FE5;
  --color-400: #5F65D3;
  --color-500: #3D43B8;
  --color-600: #353A8C;
  --color-700: #2B2E64;
  --color-800: #202141;
  --color-900: #151628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F1F2FD',
    100: '#DBDDFA',
    200: '#BABDF3',
    300: '#8A8FE5',
    400: '#5F65D3',
    500: '#3D43B8',
    600: '#353A8C',
    700: '#2B2E64',
    800: '#202141',
    900: '#151628',
  },
}

$base: #181E8A;
$base-ink: #FFFFFF;
$base-50: #F1F2FD;
$base-100: #DBDDFA;
$base-200: #BABDF3;
$base-300: #8A8FE5;
$base-400: #5F65D3;
$base-500: #3D43B8;
$base-600: #353A8C;
$base-700: #2B2E64;
$base-800: #202141;
$base-900: #151628;
$base-hover: #14186F;
$base-subtle: #AFB2E7;

{
    "color": {
        "base": {
            "value": "#181E8A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F2FD",
                "type": "color"
            },
            "100": {
                "value": "#DBDDFA",
                "type": "color"
            },
            "200": {
                "value": "#BABDF3",
                "type": "color"
            },
            "300": {
                "value": "#8A8FE5",
                "type": "color"
            },
            "400": {
                "value": "#5F65D3",
                "type": "color"
            },
            "500": {
                "value": "#3D43B8",
                "type": "color"
            },
            "600": {
                "value": "#353A8C",
                "type": "color"
            },
            "700": {
                "value": "#2B2E64",
                "type": "color"
            },
            "800": {
                "value": "#202141",
                "type": "color"
            },
            "900": {
                "value": "#151628",
                "type": "color"
            }
        }
    }
}

Palettes built on #181E8A

Color Lab

Pairs with #181E8A

UI roles & guardrails

In real applications

Scales

Every model

Export