What color is #0B384D?

#0B384D is a very dark, vivid cyan-blue. In RGB it is rgb(11, 56, 77), and in HSL hsl(199, 75%, 17%).

Is #0B384D accessible as text?

On white, #0B384D has a contrast ratio of 12.45:1 (passes WCAG AA for body text); on black it is 1.69:1 (fails). For text placed on #0B384D, use white for the best readability.

What is the closest Tailwind color to #0B384D?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #0B384D?

#0B384D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4C1F0B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B384D below.

Is #0B384D good for buttons?

#0B384D works well for buttons and highlights, but use white text on #0B384D — black text only reaches 1.69:1, below the 4.5:1 needed for normal-size labels.

Is #0B384D the same as CSS darkslategray?

No — #0B384D is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#0B384D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B384D

Not just a swatch — here's how #0B384D works with other colors. Named schemes with #0B384D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B384D Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Prussian Blue 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 #0B384D Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Prussian Blue 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 #0B384D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #33586C

Prussian 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 Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #0B384D Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #57233D

Prussian 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 #0B384D Secondary #4E5B63 Support #969386 Ink #16140F

Prussian 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0B384D 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 32/100

Cool

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

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

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 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 23/100

Low

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

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 46/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0B384D

For UI

For branding

For interior

For fashion

People also use #0B384D with

Pine Green Navy Bistre Platinum 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 12.4:1. Use

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

Avoid beside #0B224C — 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 #0B384D 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: #0B384D;
  --color-base-rgb: 11 56 77;
  --color-base-oklch: oklch(32.2% 0.060 233.8);
  --color-50: #F1FAFE;
  --color-100: #DAF1FB;
  --color-200: #B8E1F5;
  --color-300: #87C9E8;
  --color-400: #5BB0D7;
  --color-500: #3893BC;
  --color-600: #327290;
  --color-700: #295366;
  --color-800: #1E3742;
  --color-900: #142229;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F1FAFE',
    100: '#DAF1FB',
    200: '#B8E1F5',
    300: '#87C9E8',
    400: '#5BB0D7',
    500: '#3893BC',
    600: '#327290',
    700: '#295366',
    800: '#1E3742',
    900: '#142229',
  },
}

$base: #0B384D;
$base-ink: #FFFFFF;
$base-50: #F1FAFE;
$base-100: #DAF1FB;
$base-200: #B8E1F5;
$base-300: #87C9E8;
$base-400: #5BB0D7;
$base-500: #3893BC;
$base-600: #327290;
$base-700: #295366;
$base-800: #1E3742;
$base-900: #142229;
$base-hover: #092C3D;
$base-subtle: #9BCDE4;

{
    "color": {
        "base": {
            "value": "#0B384D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFE",
                "type": "color"
            },
            "100": {
                "value": "#DAF1FB",
                "type": "color"
            },
            "200": {
                "value": "#B8E1F5",
                "type": "color"
            },
            "300": {
                "value": "#87C9E8",
                "type": "color"
            },
            "400": {
                "value": "#5BB0D7",
                "type": "color"
            },
            "500": {
                "value": "#3893BC",
                "type": "color"
            },
            "600": {
                "value": "#327290",
                "type": "color"
            },
            "700": {
                "value": "#295366",
                "type": "color"
            },
            "800": {
                "value": "#1E3742",
                "type": "color"
            },
            "900": {
                "value": "#142229",
                "type": "color"
            }
        }
    }
}