What color is #0B507A?

#0B507A is a dark, vivid cyan-blue. In RGB it is rgb(11, 80, 122), and in HSL hsl(203, 83%, 26%).

Is #0B507A accessible as text?

On white, #0B507A has a contrast ratio of 8.60:1 (passes WCAG AA for body text); on black it is 2.44:1 (fails). For text placed on #0B507A, use white for the best readability.

What is the closest Tailwind color to #0B507A?

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

What colors go well with #0B507A?

#0B507A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #79350B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B507A below.

Is #0B507A good for buttons?

#0B507A works well for buttons and highlights, but use white text on #0B507A — black text only reaches 2.44:1, below the 4.5:1 needed for normal-size labels.

Is #0B507A the same as CSS darkslategray?

No — #0B507A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#0B507A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B507A

Not just a swatch — here's how #0B507A works with other colors. Named schemes with #0B507A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B507A Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #0B507A Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3D729A

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 #0B507A Secondary #7F4438 Surface #E2DDC0 Accent #375245 Anchor #57233C

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 #0B507A Surface #EEE9D6 Anchor #5A2246 Accent #E4C2CB Secondary #322B30

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 #0B507A Secondary #627585 Support #969386 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 #0B507A 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 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

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 47/100

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 25/100

Low

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

UI accent fit 73/100

High

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

Surface fit 29/100

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 #0B507A

For UI

For branding

For interior

For fashion

People also use #0B507A with

Persian Green Navy Blue Walnut Brown 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 8.6:1. Use

Subtle surface Use #C3DFF0 for cards and hover fills. Tint 80

Avoid beside #0B2A79 — 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 #0B507A 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: #0B507A;
  --color-base-rgb: 11 80 122;
  --color-base-oklch: oklch(41.4% 0.094 242.7);
  --color-50: #F0F9FE;
  --color-100: #D9EFFD;
  --color-200: #B4DEF8;
  --color-300: #82C4ED;
  --color-400: #54A9DE;
  --color-500: #318BC3;
  --color-600: #2D6D95;
  --color-700: #264F69;
  --color-800: #1C3544;
  --color-900: #13212A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0F9FE',
    100: '#D9EFFD',
    200: '#B4DEF8',
    300: '#82C4ED',
    400: '#54A9DE',
    500: '#318BC3',
    600: '#2D6D95',
    700: '#264F69',
    800: '#1C3544',
    900: '#13212A',
  },
}

$base: #0B507A;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D9EFFD;
$base-200: #B4DEF8;
$base-300: #82C4ED;
$base-400: #54A9DE;
$base-500: #318BC3;
$base-600: #2D6D95;
$base-700: #264F69;
$base-800: #1C3544;
$base-900: #13212A;
$base-hover: #093F61;
$base-subtle: #A3CFEA;

{
    "color": {
        "base": {
            "value": "#0B507A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D9EFFD",
                "type": "color"
            },
            "200": {
                "value": "#B4DEF8",
                "type": "color"
            },
            "300": {
                "value": "#82C4ED",
                "type": "color"
            },
            "400": {
                "value": "#54A9DE",
                "type": "color"
            },
            "500": {
                "value": "#318BC3",
                "type": "color"
            },
            "600": {
                "value": "#2D6D95",
                "type": "color"
            },
            "700": {
                "value": "#264F69",
                "type": "color"
            },
            "800": {
                "value": "#1C3544",
                "type": "color"
            },
            "900": {
                "value": "#13212A",
                "type": "color"
            }
        }
    }
}

Palettes built on #0B507A

Color Lab

Pairs with #0B507A

UI roles & guardrails

In real applications

Scales

Every model

Export