What color is #0B213A?

#0B213A is a very dark blue. In RGB it is rgb(11, 33, 58), and in HSL hsl(212, 68%, 14%).

Is #0B213A accessible as text?

On white, #0B213A has a contrast ratio of 16.24:1 (passes WCAG AA for body text); on black it is 1.29:1 (fails). For text placed on #0B213A, use white for the best readability.

What is the closest Tailwind color to #0B213A?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #0B213A?

#0B213A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3C250B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B213A below.

Is #0B213A good for buttons?

#0B213A works well for buttons and highlights, but use white text on #0B213A — black text only reaches 1.29:1, below the 4.5:1 needed for normal-size labels.

Is #0B213A the same as CSS midnightblue?

No — #0B213A is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#0B213A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B213A

Not just a swatch — here's how #0B213A works with other colors. Named schemes with #0B213A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B213A Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Nordic Calm Accent · 5 colors

Accent #0B213A Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Navy keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #0B213A Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2B4058

Navy is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Navy.

Vintage Leather Lead · 5 colors

Lead #0B213A Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

Navy 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 #0B213A Secondary #3D444E Support #9D8F89 Ink #16140F

Navy 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 Navy carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0B213A 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 35/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 73/100

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 27/100

Low

A faint retro warmth without tipping into sepia.

Luxury 74/100

High

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

Brand distinctiveness 21/100

Low

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

UI accent fit 18/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 52/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0B213A

For UI

For branding

For interior

For fashion

People also use #0B213A with

Dark Slate Gray Navy Bistre 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 16.2:1. Use

Subtle surface Use #BED2E9 for cards and hover fills. Tint 80

Avoid beside #0B123C — 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 #0B213A 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: #0B213A;
  --color-base-rgb: 11 33 58;
  --color-base-oklch: oklch(24.5% 0.055 253.5);
  --color-50: #F2F7FD;
  --color-100: #DCEAF9;
  --color-200: #BBD4F2;
  --color-300: #8CB5E3;
  --color-400: #6195D1;
  --color-500: #3F76B6;
  --color-600: #375E8B;
  --color-700: #2C4663;
  --color-800: #202F41;
  --color-900: #151E28;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  navy: {
    50: '#F2F7FD',
    100: '#DCEAF9',
    200: '#BBD4F2',
    300: '#8CB5E3',
    400: '#6195D1',
    500: '#3F76B6',
    600: '#375E8B',
    700: '#2C4663',
    800: '#202F41',
    900: '#151E28',
  },
}

$base: #0B213A;
$base-ink: #FFFFFF;
$base-50: #F2F7FD;
$base-100: #DCEAF9;
$base-200: #BBD4F2;
$base-300: #8CB5E3;
$base-400: #6195D1;
$base-500: #3F76B6;
$base-600: #375E8B;
$base-700: #2C4663;
$base-800: #202F41;
$base-900: #151E28;
$base-hover: #091B30;
$base-subtle: #9BBBDF;

{
    "color": {
        "base": {
            "value": "#0B213A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DCEAF9",
                "type": "color"
            },
            "200": {
                "value": "#BBD4F2",
                "type": "color"
            },
            "300": {
                "value": "#8CB5E3",
                "type": "color"
            },
            "400": {
                "value": "#6195D1",
                "type": "color"
            },
            "500": {
                "value": "#3F76B6",
                "type": "color"
            },
            "600": {
                "value": "#375E8B",
                "type": "color"
            },
            "700": {
                "value": "#2C4663",
                "type": "color"
            },
            "800": {
                "value": "#202F41",
                "type": "color"
            },
            "900": {
                "value": "#151E28",
                "type": "color"
            }
        }
    }
}