What color is #18367B?

#18367B is a dark blue. In RGB it is rgb(24, 54, 123), and in HSL hsl(222, 67%, 29%).

Is #18367B accessible as text?

On white, #18367B has a contrast ratio of 11.34:1 (passes WCAG AA for body text); on black it is 1.85:1 (fails). For text placed on #18367B, use white for the best readability.

What is the closest Tailwind color to #18367B?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #18367B?

#18367B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7B5E18. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #18367B below.

Is #18367B good for buttons?

#18367B works well for buttons and highlights, but use white text on #18367B — black text only reaches 1.85:1, below the 4.5:1 needed for normal-size labels.

Is #18367B the same as CSS midnightblue?

No — #18367B is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#18367B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #18367B

Not just a swatch — here's how #18367B works with other colors. Named schemes with #18367B in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #18367B Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F0EEE3

Yale 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 #18367B Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #191545

Yale 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 Yale Blue.

Coastal Morning Lead · 5 colors

Lead #18367B Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Yale 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 #18367B Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

Yale 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 #18367B Secondary #55627B Support #9D8F88 Ink #18140F

Yale 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 Yale Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #18367B 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 20/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

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 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 58/100

Moderate

Workable accent with care around contrast.

Surface fit 24/100

Low

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

Print safety 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #18367B

For UI

For branding

For interior

For fashion

People also use #18367B with

Dark Cyan Midnight Blue Raw Umber Gainsboro Charcoal

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 #C9D4EC for cards and hover fills. Tint 80

Avoid beside #1C187B — 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 #18367B 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: #18367B;
  --color-base-rgb: 24 54 123;
  --color-base-oklch: oklch(35.5% 0.123 263.6);
  --color-50: #F2F5FD;
  --color-100: #DCE5F9;
  --color-200: #BBCBF1;
  --color-300: #8CA6E3;
  --color-400: #6283D0;
  --color-500: #3F63B5;
  --color-600: #37508B;
  --color-700: #2C3D62;
  --color-800: #202A41;
  --color-900: #161B28;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F2F5FD',
    100: '#DCE5F9',
    200: '#BBCBF1',
    300: '#8CA6E3',
    400: '#6283D0',
    500: '#3F63B5',
    600: '#37508B',
    700: '#2C3D62',
    800: '#202A41',
    900: '#161B28',
  },
}

$base: #18367B;
$base-ink: #FFFFFF;
$base-50: #F2F5FD;
$base-100: #DCE5F9;
$base-200: #BBCBF1;
$base-300: #8CA6E3;
$base-400: #6283D0;
$base-500: #3F63B5;
$base-600: #37508B;
$base-700: #2C3D62;
$base-800: #202A41;
$base-900: #161B28;
$base-hover: #142B63;
$base-subtle: #ADBEE4;

{
    "color": {
        "base": {
            "value": "#18367B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F5FD",
                "type": "color"
            },
            "100": {
                "value": "#DCE5F9",
                "type": "color"
            },
            "200": {
                "value": "#BBCBF1",
                "type": "color"
            },
            "300": {
                "value": "#8CA6E3",
                "type": "color"
            },
            "400": {
                "value": "#6283D0",
                "type": "color"
            },
            "500": {
                "value": "#3F63B5",
                "type": "color"
            },
            "600": {
                "value": "#37508B",
                "type": "color"
            },
            "700": {
                "value": "#2C3D62",
                "type": "color"
            },
            "800": {
                "value": "#202A41",
                "type": "color"
            },
            "900": {
                "value": "#161B28",
                "type": "color"
            }
        }
    }
}

Palettes built on #18367B

Color Lab

Pairs with #18367B

UI roles & guardrails

In real applications

Scales

Every model

Export