What color is #0B4E89?

#0B4E89 is a dark, vivid blue. In RGB it is rgb(11, 78, 137), and in HSL hsl(208, 85%, 29%).

Is #0B4E89 accessible as text?

On white, #0B4E89 has a contrast ratio of 8.52:1 (passes WCAG AA for body text); on black it is 2.47:1 (fails). For text placed on #0B4E89, use white for the best readability.

What is the closest Tailwind color to #0B4E89?

The nearest Tailwind CSS token is sky-800 (#00598A).

What colors go well with #0B4E89?

#0B4E89 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #89460B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B4E89 below.

Is #0B4E89 good for buttons?

#0B4E89 works well for buttons and highlights, but use white text on #0B4E89 — black text only reaches 2.47:1, below the 4.5:1 needed for normal-size labels.

Is #0B4E89 the same as CSS darkslateblue?

No — #0B4E89 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#0B4E89 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B4E89

Not just a swatch — here's how #0B4E89 works with other colors. Named schemes with #0B4E89 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B4E89 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 #0B4E89 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3C71A9

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 #0B4E89 Secondary #7F4537 Surface #E1DDC0 Accent #375245 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 #0B4E89 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 #0B4E89 Secondary #63768C 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 #0B4E89 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 18/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 31/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 79/100

High

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

Surface fit 23/100

Low

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

Print safety 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0B4E89

For UI

For branding

For interior

For fashion

People also use #0B4E89 with

Light Sea Green Phthalo 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 8.5:1. Use

Subtle surface Use #C5DCF1 for cards and hover fills. Tint 80

Avoid beside #0B2489 — 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 #0B4E89 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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: #0B4E89;
  --color-base-rgb: 11 78 137;
  --color-base-oklch: oklch(41.9% 0.116 251.3);
  --color-50: #F0F8FE;
  --color-100: #D8ECFD;
  --color-200: #B4D9F9;
  --color-300: #81BBEE;
  --color-400: #539EDF;
  --color-500: #307FC5;
  --color-600: #2C6496;
  --color-700: #254A6A;
  --color-800: #1C3245;
  --color-900: #131F2A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0F8FE',
    100: '#D8ECFD',
    200: '#B4D9F9',
    300: '#81BBEE',
    400: '#539EDF',
    500: '#307FC5',
    600: '#2C6496',
    700: '#254A6A',
    800: '#1C3245',
    900: '#131F2A',
  },
}

$base: #0B4E89;
$base-ink: #FFFFFF;
$base-50: #F0F8FE;
$base-100: #D8ECFD;
$base-200: #B4D9F9;
$base-300: #81BBEE;
$base-400: #539EDF;
$base-500: #307FC5;
$base-600: #2C6496;
$base-700: #254A6A;
$base-800: #1C3245;
$base-900: #131F2A;
$base-hover: #093F6D;
$base-subtle: #A6CBEC;

{
    "color": {
        "base": {
            "value": "#0B4E89",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F8FE",
                "type": "color"
            },
            "100": {
                "value": "#D8ECFD",
                "type": "color"
            },
            "200": {
                "value": "#B4D9F9",
                "type": "color"
            },
            "300": {
                "value": "#81BBEE",
                "type": "color"
            },
            "400": {
                "value": "#539EDF",
                "type": "color"
            },
            "500": {
                "value": "#307FC5",
                "type": "color"
            },
            "600": {
                "value": "#2C6496",
                "type": "color"
            },
            "700": {
                "value": "#254A6A",
                "type": "color"
            },
            "800": {
                "value": "#1C3245",
                "type": "color"
            },
            "900": {
                "value": "#131F2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #0B4E89

Color Lab

Pairs with #0B4E89

UI roles & guardrails

In real applications

Scales

Every model

Export