What color is #213B7A?

#213B7A is a dark blue. In RGB it is rgb(33, 59, 122), and in HSL hsl(222, 57%, 30%).

Is #213B7A accessible as text?

On white, #213B7A has a contrast ratio of 10.65:1 (passes WCAG AA for body text); on black it is 1.97:1 (fails). For text placed on #213B7A, use white for the best readability.

What is the closest Tailwind color to #213B7A?

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

What colors go well with #213B7A?

#213B7A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #785E21. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #213B7A below.

Is #213B7A good for buttons?

#213B7A works well for buttons and highlights, but use white text on #213B7A — black text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #213B7A the same as CSS darkslateblue?

No — #213B7A is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#213B7A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #213B7A

Not just a swatch — here's how #213B7A works with other colors. Named schemes with #213B7A in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #213B7A Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F4ECE3

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 #213B7A Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1D1A45

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 #213B7A Accent #A5C4C2 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 #213B7A Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

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 #213B7A Secondary #5B667D 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 #213B7A 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 23/100

Cool

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

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

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 40/100

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 43/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 62/100

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 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #213B7A

For UI

For branding

For interior

For fashion

People also use #213B7A with

Dark Cyan Indigo 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 10.7:1. Use

Subtle surface Use #CDD5EA for cards and hover fills. Tint 80

Avoid beside #242178 — 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 #213B7A 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: #213B7A;
  --color-base-rgb: 33 59 122;
  --color-base-oklch: oklch(36.9% 0.112 264.6);
  --color-50: #F3F5FC;
  --color-100: #DEE6F7;
  --color-200: #BFCDED;
  --color-300: #93A9DC;
  --color-400: #6A86C8;
  --color-500: #4866AD;
  --color-600: #3D5384;
  --color-700: #303E5E;
  --color-800: #232B3E;
  --color-900: #171C26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F3F5FC',
    100: '#DEE6F7',
    200: '#BFCDED',
    300: '#93A9DC',
    400: '#6A86C8',
    500: '#4866AD',
    600: '#3D5384',
    700: '#303E5E',
    800: '#232B3E',
    900: '#171C26',
  },
}

$base: #213B7A;
$base-ink: #FFFFFF;
$base-50: #F3F5FC;
$base-100: #DEE6F7;
$base-200: #BFCDED;
$base-300: #93A9DC;
$base-400: #6A86C8;
$base-500: #4866AD;
$base-600: #3D5384;
$base-700: #303E5E;
$base-800: #232B3E;
$base-900: #171C26;
$base-hover: #1A2F60;
$base-subtle: #B2C0E1;

{
    "color": {
        "base": {
            "value": "#213B7A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE6F7",
                "type": "color"
            },
            "200": {
                "value": "#BFCDED",
                "type": "color"
            },
            "300": {
                "value": "#93A9DC",
                "type": "color"
            },
            "400": {
                "value": "#6A86C8",
                "type": "color"
            },
            "500": {
                "value": "#4866AD",
                "type": "color"
            },
            "600": {
                "value": "#3D5384",
                "type": "color"
            },
            "700": {
                "value": "#303E5E",
                "type": "color"
            },
            "800": {
                "value": "#232B3E",
                "type": "color"
            },
            "900": {
                "value": "#171C26",
                "type": "color"
            }
        }
    }
}

Palettes built on #213B7A

Color Lab

Pairs with #213B7A

UI roles & guardrails

In real applications

Scales

Every model

Export