What color is #053666?

#053666 is a dark, vivid blue. In RGB it is rgb(5, 54, 102), and in HSL hsl(210, 91%, 21%).

Is #053666 accessible as text?

On white, #053666 has a contrast ratio of 12.17:1 (passes WCAG AA for body text); on black it is 1.73:1 (fails). For text placed on #053666, use white for the best readability.

What is the closest Tailwind color to #053666?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #053666?

#053666 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #663605. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #053666 below.

Is #053666 good for buttons?

#053666 works well for buttons and highlights, but use white text on #053666 — black text only reaches 1.73:1, below the 4.5:1 needed for normal-size labels.

Is #053666 the same as CSS midnightblue?

No — #053666 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#053666 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #053666

Not just a swatch — here's how #053666 works with other colors. Named schemes with #053666 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #053666 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Yale Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Luxury Packaging Feature · 5 colors

Feature #053666 Anchor #141210 Accent #AEAE52 Secondary #222A33 Surface #F0EEE3

Yale Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #053666 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #0E1538

Yale Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Yale Blue.

Vintage Leather Lead · 5 colors

Lead #053666 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

Yale 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 #053666 Secondary #4E5D6F Support #9D8F89 Ink #16140F

Yale 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 Yale Blue carrying the quiet middle.

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Color Lab

How #053666 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 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 40/100

Low

A faint retro warmth without tipping into sepia.

Luxury 71/100

High

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

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 47/100

Moderate

Workable accent with care around contrast.

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #053666

For UI

For branding

For interior

For fashion

People also use #053666 with

Dark Cyan Midnight Blue Espresso 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 12.2:1. Use

Subtle surface Use #BCD7F1 for cards and hover fills. Tint 80

Avoid beside #051566 — 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 #053666 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: #053666;
  --color-base-rgb: 5 54 102;
  --color-base-oklch: oklch(33.2% 0.097 253.1);
  --color-50: #F0F7FE;
  --color-100: #D8EBFD;
  --color-200: #B1D6FB;
  --color-300: #7DB8F2;
  --color-400: #4E99E4;
  --color-500: #2A7ACB;
  --color-600: #28619A;
  --color-700: #23476C;
  --color-800: #1B3046;
  --color-900: #121F2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F0F7FE',
    100: '#D8EBFD',
    200: '#B1D6FB',
    300: '#7DB8F2',
    400: '#4E99E4',
    500: '#2A7ACB',
    600: '#28619A',
    700: '#23476C',
    800: '#1B3046',
    900: '#121F2B',
  },
}

$base: #053666;
$base-ink: #FFFFFF;
$base-50: #F0F7FE;
$base-100: #D8EBFD;
$base-200: #B1D6FB;
$base-300: #7DB8F2;
$base-400: #4E99E4;
$base-500: #2A7ACB;
$base-600: #28619A;
$base-700: #23476C;
$base-800: #1B3046;
$base-900: #121F2B;
$base-hover: #042B52;
$base-subtle: #99C3EC;

{
    "color": {
        "base": {
            "value": "#053666",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F7FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EBFD",
                "type": "color"
            },
            "200": {
                "value": "#B1D6FB",
                "type": "color"
            },
            "300": {
                "value": "#7DB8F2",
                "type": "color"
            },
            "400": {
                "value": "#4E99E4",
                "type": "color"
            },
            "500": {
                "value": "#2A7ACB",
                "type": "color"
            },
            "600": {
                "value": "#28619A",
                "type": "color"
            },
            "700": {
                "value": "#23476C",
                "type": "color"
            },
            "800": {
                "value": "#1B3046",
                "type": "color"
            },
            "900": {
                "value": "#121F2B",
                "type": "color"
            }
        }
    }
}

Palettes built on #053666

Color Lab

Pairs with #053666

UI roles & guardrails

In real applications

Scales

Every model

Export