What color is #13487E?

#13487E is a dark, vivid blue. In RGB it is rgb(19, 72, 126), and in HSL hsl(210, 74%, 28%).

Is #13487E accessible as text?

On white, #13487E has a contrast ratio of 9.31:1 (passes WCAG AA for body text); on black it is 2.26:1 (fails). For text placed on #13487E, use white for the best readability.

What is the closest Tailwind color to #13487E?

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

What colors go well with #13487E?

#13487E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7C4713. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #13487E below.

Is #13487E good for buttons?

#13487E works well for buttons and highlights, but use white text on #13487E — black text only reaches 2.26:1, below the 4.5:1 needed for normal-size labels.

Is #13487E the same as CSS darkslateblue?

No — #13487E is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#13487E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #13487E

Not just a swatch — here's how #13487E works with other colors. Named schemes with #13487E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #13487E Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Classic Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #13487E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3E6B9E

Classic 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 Classic Blue.

Vintage Leather Lead · 5 colors

Lead #13487E Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

Classic 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.

Berry & Cream Lead · 5 colors

Lead #13487E Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

Classic Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #13487E Secondary #5F7084 Support #959386 Ink #16140F

Classic 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #13487E 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 21/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 29/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 71/100

High

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

Surface fit 27/100

Low

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

Print safety 78/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #13487E

For UI

For branding

For interior

For fashion

People also use #13487E with

Persian Green 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 9.3:1. Use

Subtle surface Use #C7DAEE for cards and hover fills. Tint 80

Avoid beside #13247C — 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 #13487E at work across the surfaces designers actually ship.

Website / UI

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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: #13487E;
  --color-base-rgb: 19 72 126;
  --color-base-oklch: oklch(39.8% 0.106 252.7);
  --color-50: #F1F7FE;
  --color-100: #DBEBFB;
  --color-200: #B8D6F4;
  --color-300: #88B8E7;
  --color-400: #5C99D6;
  --color-500: #397ABC;
  --color-600: #33618F;
  --color-700: #2A4765;
  --color-800: #1F3042;
  --color-900: #151F29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F1F7FE',
    100: '#DBEBFB',
    200: '#B8D6F4',
    300: '#88B8E7',
    400: '#5C99D6',
    500: '#397ABC',
    600: '#33618F',
    700: '#2A4765',
    800: '#1F3042',
    900: '#151F29',
  },
}

$base: #13487E;
$base-ink: #FFFFFF;
$base-50: #F1F7FE;
$base-100: #DBEBFB;
$base-200: #B8D6F4;
$base-300: #88B8E7;
$base-400: #5C99D6;
$base-500: #397ABC;
$base-600: #33618F;
$base-700: #2A4765;
$base-800: #1F3042;
$base-900: #151F29;
$base-hover: #0F3963;
$base-subtle: #A9C8E7;

{
    "color": {
        "base": {
            "value": "#13487E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F7FE",
                "type": "color"
            },
            "100": {
                "value": "#DBEBFB",
                "type": "color"
            },
            "200": {
                "value": "#B8D6F4",
                "type": "color"
            },
            "300": {
                "value": "#88B8E7",
                "type": "color"
            },
            "400": {
                "value": "#5C99D6",
                "type": "color"
            },
            "500": {
                "value": "#397ABC",
                "type": "color"
            },
            "600": {
                "value": "#33618F",
                "type": "color"
            },
            "700": {
                "value": "#2A4765",
                "type": "color"
            },
            "800": {
                "value": "#1F3042",
                "type": "color"
            },
            "900": {
                "value": "#151F29",
                "type": "color"
            }
        }
    }
}

Palettes built on #13487E

Color Lab

Pairs with #13487E

UI roles & guardrails

In real applications

Scales

Every model

Export