What color is #0B63AB?

#0B63AB is a dark, vivid cyan-blue. In RGB it is rgb(11, 99, 171), and in HSL hsl(207, 88%, 36%).

Is #0B63AB accessible as text?

On white, #0B63AB has a contrast ratio of 6.20:1 (passes WCAG AA for body text); on black it is 3.39:1 (fails). For text placed on #0B63AB, use white for the best readability.

What is the closest Tailwind color to #0B63AB?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #0B63AB?

#0B63AB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AD540B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B63AB below.

Is #0B63AB good for buttons?

#0B63AB works well for buttons and highlights, but use white text on #0B63AB — black text only reaches 3.39:1, below the 4.5:1 needed for normal-size labels.

Is #0B63AB the same as CSS royalblue?

No — #0B63AB is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#0B63AB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B63AB

Not just a swatch — here's how #0B63AB works with other colors. Named schemes with #0B63AB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B63AB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Lapis Lazuli 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 #0B63AB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4588CB

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

Vintage Leather Lead · 5 colors

Lead #0B63AB Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Lapis Lazuli 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 #0B63AB Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

Lapis Lazuli 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 #0B63AB Secondary #758DA7 Support #959386 Ink #16140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0B63AB 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 12/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 56/100

Moderate

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

Brand distinctiveness 37/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 98/100

Very high

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

Surface fit 11/100

Very low

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

Print safety 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0B63AB

For UI

For branding

For interior

For fashion

People also use #0B63AB with

Medium Turquoise Zaffre Sienna Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 6.2:1. Use

Subtle surface Use #CAE0F3 for cards and hover fills. Tint 80

Avoid beside #0B2EAD — 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 #0B63AB at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #0B63AB;
  --color-base-rgb: 11 99 171;
  --color-base-oklch: oklch(49.3% 0.137 250.6);
  --color-50: #F0F8FE;
  --color-100: #D8ECFD;
  --color-200: #B2DAFA;
  --color-300: #7FBDF0;
  --color-400: #50A0E2;
  --color-500: #2D82C8;
  --color-600: #2A6698;
  --color-700: #244B6B;
  --color-800: #1B3346;
  --color-900: #13202B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F0F8FE',
    100: '#D8ECFD',
    200: '#B2DAFA',
    300: '#7FBDF0',
    400: '#50A0E2',
    500: '#2D82C8',
    600: '#2A6698',
    700: '#244B6B',
    800: '#1B3346',
    900: '#13202B',
  },
}

$base: #0B63AB;
$base-ink: #FFFFFF;
$base-50: #F0F8FE;
$base-100: #D8ECFD;
$base-200: #B2DAFA;
$base-300: #7FBDF0;
$base-400: #50A0E2;
$base-500: #2D82C8;
$base-600: #2A6698;
$base-700: #244B6B;
$base-800: #1B3346;
$base-900: #13202B;
$base-hover: #09508A;
$base-subtle: #ADD1EF;

{
    "color": {
        "base": {
            "value": "#0B63AB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F8FE",
                "type": "color"
            },
            "100": {
                "value": "#D8ECFD",
                "type": "color"
            },
            "200": {
                "value": "#B2DAFA",
                "type": "color"
            },
            "300": {
                "value": "#7FBDF0",
                "type": "color"
            },
            "400": {
                "value": "#50A0E2",
                "type": "color"
            },
            "500": {
                "value": "#2D82C8",
                "type": "color"
            },
            "600": {
                "value": "#2A6698",
                "type": "color"
            },
            "700": {
                "value": "#244B6B",
                "type": "color"
            },
            "800": {
                "value": "#1B3346",
                "type": "color"
            },
            "900": {
                "value": "#13202B",
                "type": "color"
            }
        }
    }
}

Palettes built on #0B63AB

Color Lab

Pairs with #0B63AB

UI roles & guardrails

In real applications

Scales

Every model

Export