What color is #183E76?

#183E76 is a dark blue. In RGB it is rgb(24, 62, 118), and in HSL hsl(216, 66%, 28%).

Is #183E76 accessible as text?

On white, #183E76 has a contrast ratio of 10.56:1 (passes WCAG AA for body text); on black it is 1.99:1 (fails). For text placed on #183E76, use white for the best readability.

What is the closest Tailwind color to #183E76?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #183E76?

#183E76 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #775118. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #183E76 below.

Is #183E76 good for buttons?

#183E76 works well for buttons and highlights, but use white text on #183E76 — black text only reaches 1.99:1, below the 4.5:1 needed for normal-size labels.

Is #183E76 the same as CSS darkslateblue?

No — #183E76 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#183E76 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #183E76

Not just a swatch — here's how #183E76 works with other colors. Named schemes with #183E76 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #183E76 Anchor #141210 Accent #ADAE53 Secondary #232933 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 #183E76 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #191C44

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 #183E76 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #183E76 Secondary #7F4537 Surface #E1DDC1 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 #F6F4EF Accent #183E76 Secondary #59677B Support #9D8F89 Ink #16140F

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 #183E76 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 22/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 61/100

High

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

Surface fit 29/100

Low

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

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #183E76

For UI

For branding

For interior

For fashion

People also use #183E76 with

Dark Cyan Midnight Blue Russet 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 10.6:1. Use

Subtle surface Use #C9D7EC for cards and hover fills. Tint 80

Avoid beside #181F77 — 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 #183E76 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: #183E76;
  --color-base-rgb: 24 62 118;
  --color-base-oklch: oklch(37.0% 0.105 258.3);
  --color-50: #F2F6FD;
  --color-100: #DCE8F9;
  --color-200: #BBD1F1;
  --color-300: #8DAFE2;
  --color-400: #628ED0;
  --color-500: #406FB5;
  --color-600: #38598A;
  --color-700: #2D4262;
  --color-800: #212D40;
  --color-900: #161D28;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F2F6FD',
    100: '#DCE8F9',
    200: '#BBD1F1',
    300: '#8DAFE2',
    400: '#628ED0',
    500: '#406FB5',
    600: '#38598A',
    700: '#2D4262',
    800: '#212D40',
    900: '#161D28',
  },
}

$base: #183E76;
$base-ink: #FFFFFF;
$base-50: #F2F6FD;
$base-100: #DCE8F9;
$base-200: #BBD1F1;
$base-300: #8DAFE2;
$base-400: #628ED0;
$base-500: #406FB5;
$base-600: #38598A;
$base-700: #2D4262;
$base-800: #212D40;
$base-900: #161D28;
$base-hover: #13325F;
$base-subtle: #ACC2E4;

{
    "color": {
        "base": {
            "value": "#183E76",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F6FD",
                "type": "color"
            },
            "100": {
                "value": "#DCE8F9",
                "type": "color"
            },
            "200": {
                "value": "#BBD1F1",
                "type": "color"
            },
            "300": {
                "value": "#8DAFE2",
                "type": "color"
            },
            "400": {
                "value": "#628ED0",
                "type": "color"
            },
            "500": {
                "value": "#406FB5",
                "type": "color"
            },
            "600": {
                "value": "#38598A",
                "type": "color"
            },
            "700": {
                "value": "#2D4262",
                "type": "color"
            },
            "800": {
                "value": "#212D40",
                "type": "color"
            },
            "900": {
                "value": "#161D28",
                "type": "color"
            }
        }
    }
}

Palettes built on #183E76

Color Lab

Pairs with #183E76

UI roles & guardrails

In real applications

Scales

Every model

Export