What color is #13239C?

#13239C is a dark, vivid blue. In RGB it is rgb(19, 35, 156), and in HSL hsl(233, 78%, 34%).

Is #13239C accessible as text?

On white, #13239C has a contrast ratio of 12.01:1 (passes WCAG AA for body text); on black it is 1.75:1 (fails). For text placed on #13239C, use white for the best readability.

What is the closest Tailwind color to #13239C?

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

What colors go well with #13239C?

#13239C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9A8B13. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #13239C below.

Is #13239C good for buttons?

#13239C works well for buttons and highlights, but use white text on #13239C — black text only reaches 1.75:1, below the 4.5:1 needed for normal-size labels.

Is #13239C the same as CSS darkblue?

No — #13239C is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#13239C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #13239C

Not just a swatch — here's how #13239C works with other colors. Named schemes with #13239C in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #13239C 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 #13239C Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #304FBA

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 #13239C Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1E0157

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 #13239C 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 #13239C Secondary #506087 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.

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Color Lab

How #13239C 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 24/100

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 20/100

Low

Clean and current — no dusty, aged cast.

Luxury 64/100

High

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

Brand distinctiveness 74/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 52/100

Moderate

Workable accent with care around contrast.

Surface fit 17/100

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 #13239C

For UI

For branding

For interior

For fashion

People also use #13239C 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 12.0:1. Use

Subtle surface Use #CACFF0 for cards and hover fills. Tint 80

Avoid beside #30139A — 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 #13239C 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: #13239C;
  --color-base-rgb: 19 35 156;
  --color-base-oklch: oklch(35.2% 0.191 267.1);
  --color-50: #F1F2FE;
  --color-100: #DADEFB;
  --color-200: #B6BEF6;
  --color-300: #8591EA;
  --color-400: #5867DA;
  --color-500: #3646BF;
  --color-600: #303C91;
  --color-700: #282F67;
  --color-800: #1E2243;
  --color-900: #141729;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  klein-blue: {
    50: '#F1F2FE',
    100: '#DADEFB',
    200: '#B6BEF6',
    300: '#8591EA',
    400: '#5867DA',
    500: '#3646BF',
    600: '#303C91',
    700: '#282F67',
    800: '#1E2243',
    900: '#141729',
  },
}

$base: #13239C;
$base-ink: #FFFFFF;
$base-50: #F1F2FE;
$base-100: #DADEFB;
$base-200: #B6BEF6;
$base-300: #8591EA;
$base-400: #5867DA;
$base-500: #3646BF;
$base-600: #303C91;
$base-700: #282F67;
$base-800: #1E2243;
$base-900: #141729;
$base-hover: #0F1C7B;
$base-subtle: #AFB6EA;

{
    "color": {
        "base": {
            "value": "#13239C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F2FE",
                "type": "color"
            },
            "100": {
                "value": "#DADEFB",
                "type": "color"
            },
            "200": {
                "value": "#B6BEF6",
                "type": "color"
            },
            "300": {
                "value": "#8591EA",
                "type": "color"
            },
            "400": {
                "value": "#5867DA",
                "type": "color"
            },
            "500": {
                "value": "#3646BF",
                "type": "color"
            },
            "600": {
                "value": "#303C91",
                "type": "color"
            },
            "700": {
                "value": "#282F67",
                "type": "color"
            },
            "800": {
                "value": "#1E2243",
                "type": "color"
            },
            "900": {
                "value": "#141729",
                "type": "color"
            }
        }
    }
}

Palettes built on #13239C

Color Lab

Pairs with #13239C

UI roles & guardrails

In real applications

Scales

Every model

Export