What color is #066AB2?

#066AB2 is a dark, vivid cyan-blue. In RGB it is rgb(6, 106, 178), and in HSL hsl(205, 93%, 36%).

Is #066AB2 accessible as text?

On white, #066AB2 has a contrast ratio of 5.66:1 (passes WCAG AA for body text); on black it is 3.71:1 (fails). For text placed on #066AB2, use white for the best readability.

What is the closest Tailwind color to #066AB2?

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

What colors go well with #066AB2?

#066AB2 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B14E06. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #066AB2 below.

Is #066AB2 good for buttons?

#066AB2 works well for buttons and highlights, but use white text on #066AB2 — black text only reaches 3.71:1, below the 4.5:1 needed for normal-size labels.

Is #066AB2 the same as CSS royalblue?

No — #066AB2 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#066AB2 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #066AB2

Not just a swatch — here's how #066AB2 works with other colors. Named schemes with #066AB2 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #066AB2 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Denim 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 #066AB2 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #468FD2

Denim 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 Denim Blue.

Vintage Leather Lead · 5 colors

Lead #066AB2 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233B

Denim 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 #066AB2 Surface #EDE9D6 Anchor #5A2245 Accent #E4C2CB Secondary #322B2F

Denim 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 #066AB2 Secondary #7A93AD Support #969386 Ink #16140F

Denim 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 Denim Blue carrying the quiet middle.

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Color Lab

How #066AB2 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 11/100

Cool

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 50/100

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 54/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 37/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 100/100

Very high

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

Surface fit 12/100

Very low

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

Print safety 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #066AB2

For UI

For branding

For interior

For fashion

People also use #066AB2 with

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 5.7:1. Use

Subtle surface Use #C9E2F4 for cards and hover fills. Tint 80

Avoid beside #0631B1 — 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 #066AB2 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: #066AB2;
  --color-base-rgb: 6 106 178;
  --color-base-oklch: oklch(51.3% 0.139 248.8);
  --color-50: #F0F9FE;
  --color-100: #D8EEFD;
  --color-200: #B1DCFC;
  --color-300: #7CC2F4;
  --color-400: #4CA6E6;
  --color-500: #2988CC;
  --color-600: #276B9B;
  --color-700: #224E6D;
  --color-800: #1A3447;
  --color-900: #12212B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F0F9FE',
    100: '#D8EEFD',
    200: '#B1DCFC',
    300: '#7CC2F4',
    400: '#4CA6E6',
    500: '#2988CC',
    600: '#276B9B',
    700: '#224E6D',
    800: '#1A3447',
    900: '#12212B',
  },
}

$base: #066AB2;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D8EEFD;
$base-200: #B1DCFC;
$base-300: #7CC2F4;
$base-400: #4CA6E6;
$base-500: #2988CC;
$base-600: #276B9B;
$base-700: #224E6D;
$base-800: #1A3447;
$base-900: #12212B;
$base-hover: #05558E;
$base-subtle: #ABD4F1;

{
    "color": {
        "base": {
            "value": "#066AB2",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EEFD",
                "type": "color"
            },
            "200": {
                "value": "#B1DCFC",
                "type": "color"
            },
            "300": {
                "value": "#7CC2F4",
                "type": "color"
            },
            "400": {
                "value": "#4CA6E6",
                "type": "color"
            },
            "500": {
                "value": "#2988CC",
                "type": "color"
            },
            "600": {
                "value": "#276B9B",
                "type": "color"
            },
            "700": {
                "value": "#224E6D",
                "type": "color"
            },
            "800": {
                "value": "#1A3447",
                "type": "color"
            },
            "900": {
                "value": "#12212B",
                "type": "color"
            }
        }
    }
}

Palettes built on #066AB2

Color Lab

Pairs with #066AB2

UI roles & guardrails

In real applications

Scales

Every model

Export