Is Dark Blue (#00008B) accessible for digital body text?

Against a pure white background (#FFFFFF), #00008B achieves a contrast ratio of 15.30:1 (Passing WCAG AA normal text). Against a dark slate background (#0F172A), it achieves a contrast ratio of 1.17:1 (Failing WCAG AA normal text).

Which color harmonies pair best with Dark Blue?

The exact complementary color for #00008B is #8A8A00. For analogous pairings, use #00458A and #45008A. You can explore these combinations further in our Color Harmony Generator.

Color Directory/Dark Blue

Dark Blue (#00008B)

Q: What are the exact digital and print color codes for Dark Blue (#00008B)?

Dark Blue has the HEX code #00008B. In RGB color coordinates, its values are 0, 0, 139. In HSL, it is 240°, 100%, 27%. In CMYK print values, it corresponds to C:100% M:100% Y:0% K:45%.

Luminance: 2% · Nearest standard name: Dark Blue

Generate Around This Color

DARK BLUE

#00008B

rgb(0, 0, 139) · hsl(240°, 100%, 27%)

HEX#00008B

RGB0, 0, 139

HSL240°, 100%, 27%

HSV / HSB240°, 100%, 55%

CMYK (Print)100%, 100%, 0%, 45%

Color Harmonies

Complementary

#00008B#8A8A00

Analogous

#00458A#00008B#45008A

Triadic

#00008B#8A0000#008A00

Tints & Shades

Lighter Tints

Darker Shades

WCAG 2.2 Contrast Verification

Against White (#FFFFFF)15.30:1

Sample text rendered with #00008B on white

AA Normal: PASSAA Large: PASS

Against Dark (#0F172A)1.17:1

Sample text rendered with #00008B on dark

AA Normal: FAILAA Large: FAIL

Palettes Featuring Similar Tones

cp-featured-01Technology

TechModernCool

cp-featured-02Sunset

SunsetGradientCreative

cp-featured-03Vintage

VintageRetroWarm

cp-featured-04Gaming

Cyber Glitch Protocol

GamingFuturisticNeon

Comprehensive Color Profile & Design Architecture

The Complete Color Guide to Dark Blue (#00008B)

Dark Blue (#00008B) is a distinct shade within the Blue chromatic spectrum. Characterized by an optical luminance of 2% and a cool color temperature, this tone plays a vital role across web applications, brand identities, and editorial typography. Discover its mathematical harmonies, accessibility metrics, UI engineering roles, and front-end code tokens.

Technical Colorimetry & Coordinate Breakdown

Exact mathematical values across digital display, print press, and human perceptual spaces.

HEX Code#00008B

RGB Space0, 0, 139

HSL Values240°, 100%, 27%

HSV / HSB240°, 100%, 55%

CMYK Ink100%, 100%, 0%, 45%

TemperatureCool

Optical Color Harmony Formulas for Dark Blue

Geometric intervals calculated from #00008B on the 360-degree color wheel.

Direct Polar (180°)#8A8A00

Complementary Harmony

Pairs Dark Blue with its polar opposite (#8A8A00) to create maximum optical contrast, perfect for high-converting call-to-action buttons.

Adjacent (±30°)#00458A · #45008A

Analogous Harmony

Positions adjacent neighboring hues on either side of Dark Blue for serene, gentle, and organic visual transitions.

Split Angles (150° / 210°)#8A4500 · #458A00

Split-Complementary

Uses the two colors flanking the direct complement of Dark Blue, offering rich visual variety without harsh chromatic vibration.

Triangular (120°)#8A0000 · #008A00

Triadic Harmony

Forms an equilateral triangle on the color wheel, generating playful, dynamic energy when balanced against a neutral background.

Rectangular (90°)#8A0045 · #8A8A00 · #008A45

Tetradic (Square) Harmony

A rich four-color scheme combining two complementary pairs, ideal for complex dashboards, gaming HUDs, and multi-tier charts.

Interactive Exploration

Build Palettes With Dark Blue

Lock #00008B inside our interactive generator to calculate live matching palettes in real time.

Launch Palette Generator

The 60-30-10 UI Implementation Role for Dark Blue

Recommended proportional volume and semantic interface assignment.

Recommended Assignment: Interactive Brand Accent (10% Volume)

With a saturation of 100% and lightness of 27%, Dark Blue (#00008B) acts as an attention-grabbing focal point. In user interfaces, reserve it for primary CTA buttons, active state indicators, and notification badges to draw user clicks immediately.

Light Mode SurfaceIdeal for buttons and badges

Dark Mode AdaptationOptimal dark canvas backdrop

Tonal Expansion ScaleView 10-step design token ramp →

Color Psychology & Industry Alignment

Strategic cognitive triggers and target sector recommendations.

Cognitive & Emotional Perception

This color projects authority, intelligence, and calm dependability. Universally trusted across enterprise software and fintech products.

Optimal Industry Verticals

Fintech, Enterprise SaaS, Healthcare, Cloud Infrastructure. Combining Dark Blue with intentional neutral whitespace reinforces authority and conversion clarity.

Production Code Tokens for Dark Blue

Drop-in design system tokens for CSS, Tailwind CSS, and SCSS.

CSS Custom Properties (:root)Vanilla CSS

:root {
  --color-00008b: #00008B;
  --color-00008b-rgb: 0, 0, 139;
  --color-00008b-hsl: 240deg 100% 27%;
}

tailwind.config.jsTailwind CSS

module.exports = {
  theme: {
    extend: {
      colors: {
        '00008b': '#00008B',
      }
    }
  }
};

Explore Related Color Tools for Dark Blue

Continue developing your color system with specialized design tools.

Palette Generator

Generate harmonious 5-color palettes anchored to Dark Blue.

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WCAG Contrast Checker

Verify Level AA and AAA readability for Dark Blue against any background.

Check Contrast

Shades & Tints Scale

Generate a full 10-step tonal scale from 50 to 900 for Dark Blue.

Expand Scale

CSS Gradient Generator

Create linear and radial gradients blending Dark Blue with complementary hues.

Build Gradients

Frequently Asked Questions About Dark Blue (#00008B)

Authoritative answers covering Dark Blue color codes, WCAG contrast compliance, and UI design systems.

What are the exact digital and print color codes for Dark Blue (#00008B)?

Dark Blue is defined by the HEX code #00008B. Its digital screen RGB coordinates are R:0, G:0, B:139. Its cylindrical HSL values are Hue:240°, Saturation:100%, Lightness:27%. In HSV/HSB format, it is 240°, 100%, 55%. For four-color CMYK process printing, its ink percentages are C:100%, M:100%, Y:0%, K:45%.

Does Dark Blue (#00008B) pass WCAG 2.2 accessibility standards for text readability?

Against a pure white (#FFFFFF) background, Dark Blue achieves a contrast ratio of 15.30:1 (Passing WCAG AA for normal body text, and Passing for large headings). Against dark slate (#0F172A), it achieves a contrast ratio of 1.17:1 (Failing WCAG AA).

What is the direct complementary color for Dark Blue (#00008B)?

The exact 180-degree optical complementary color for #00008B is #8A8A00. When placed side-by-side, #00008B and #8A8A00 create maximum visual tension and high click-through conversion rates.

What is the recommended role for Dark Blue in the 60-30-10 UI design rule?

How can I copy and export Dark Blue into Tailwind CSS and CSS variables?

You can define Dark Blue in CSS custom properties as ':root { --color-custom: #00008B; }' or paste it into your 'tailwind.config.js' file under 'theme.extend.colors'. You can also generate full palettes containing Dark Blue using our interactive Color Palette Generator.

Which color family does Dark Blue (#00008B) belong to?

Dark Blue belongs to the Blue family (Cool spectrum). You can explore full tonal ramps and curated palettes in our Blue Color Guide.