What color is #08405B?

#08405B is a dark, vivid cyan-blue. In RGB it is rgb(8, 64, 91), and in HSL hsl(200, 84%, 19%).

Is #08405B accessible as text?

On white, #08405B has a contrast ratio of 11.08:1 (passes WCAG AA for body text); on black it is 1.89:1 (fails). For text placed on #08405B, use white for the best readability.

What is the closest Tailwind color to #08405B?

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

What colors go well with #08405B?

#08405B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #592308. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #08405B below.

Is #08405B good for buttons?

#08405B works well for buttons and highlights, but use white text on #08405B — black text only reaches 1.89:1, below the 4.5:1 needed for normal-size labels.

Is #08405B the same as CSS darkslategray?

No — #08405B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#08405B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #08405B

Not just a swatch — here's how #08405B works with other colors. Named schemes with #08405B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #08405B Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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

Nordic Calm Accent · 5 colors

Accent #08405B Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Yale Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #08405B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #35617B

Yale 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 Yale Blue.

Vintage Leather Lead · 5 colors

Lead #08405B Secondary #6E5216 Surface #E2DDC0 Accent #385245 Anchor #57233D

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 #08405B Secondary #54636D Support #969386 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.

Build a working theme in the generator →

Color Lab

How #08405B 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 29/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

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 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 27/100

Low

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

UI accent fit 48/100

Moderate

Workable accent with care around contrast.

Surface fit 40/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #08405B

For UI

For branding

For interior

For fashion

People also use #08405B with

Pine Green Navy Bistre 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 11.1:1. Use

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

Avoid beside #082359 — 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 #08405B 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: #08405B;
  --color-base-rgb: 8 64 91;
  --color-base-oklch: oklch(35.2% 0.071 236.2);
  --color-50: #F0FAFE;
  --color-100: #D8F1FD;
  --color-200: #B4E2F8;
  --color-300: #81CAEE;
  --color-400: #53B0DF;
  --color-500: #3093C4;
  --color-600: #2D7295;
  --color-700: #255369;
  --color-800: #1C3745;
  --color-900: #13222A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F0FAFE',
    100: '#D8F1FD',
    200: '#B4E2F8',
    300: '#81CAEE',
    400: '#53B0DF',
    500: '#3093C4',
    600: '#2D7295',
    700: '#255369',
    800: '#1C3745',
    900: '#13222A',
  },
}

$base: #08405B;
$base-ink: #FFFFFF;
$base-50: #F0FAFE;
$base-100: #D8F1FD;
$base-200: #B4E2F8;
$base-300: #81CAEE;
$base-400: #53B0DF;
$base-500: #3093C4;
$base-600: #2D7295;
$base-700: #255369;
$base-800: #1C3745;
$base-900: #13222A;
$base-hover: #063247;
$base-subtle: #99CEE9;

{
    "color": {
        "base": {
            "value": "#08405B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FAFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F1FD",
                "type": "color"
            },
            "200": {
                "value": "#B4E2F8",
                "type": "color"
            },
            "300": {
                "value": "#81CAEE",
                "type": "color"
            },
            "400": {
                "value": "#53B0DF",
                "type": "color"
            },
            "500": {
                "value": "#3093C4",
                "type": "color"
            },
            "600": {
                "value": "#2D7295",
                "type": "color"
            },
            "700": {
                "value": "#255369",
                "type": "color"
            },
            "800": {
                "value": "#1C3745",
                "type": "color"
            },
            "900": {
                "value": "#13222A",
                "type": "color"
            }
        }
    }
}