Is Indigo (#4B0082) accessible for digital body text?

Against a pure white background (#FFFFFF), #4B0082 achieves a contrast ratio of 12.95:1 (Passing WCAG AA normal text). Against a dark slate background (#0F172A), it achieves a contrast ratio of 1.38:1 (Failing WCAG AA normal text).

Which color harmonies pair best with Indigo?

The exact complementary color for #4B0082 is #358000. For analogous pairings, use #0B0080 and #800075. You can explore these combinations further in our Color Harmony Generator.

Color Directory/Indigo

Indigo (#4B0082)

Q: What are the exact digital and print color codes for Indigo (#4B0082)?

Indigo has the HEX code #4B0082. In RGB color coordinates, its values are 75, 0, 130. In HSL, it is 275°, 100%, 25%. In CMYK print values, it corresponds to C:42% M:100% Y:0% K:49%.

Luminance: 3% · Nearest standard name: Indigo

Generate Around This Color

INDIGO

#4B0082

rgb(75, 0, 130) · hsl(275°, 100%, 25%)

HEX#4B0082

RGB75, 0, 130

HSL275°, 100%, 25%

HSV / HSB275°, 100%, 51%

CMYK (Print)42%, 100%, 0%, 49%

Color Harmonies

Complementary

#4B0082#358000

Analogous

#0B0080#4B0082#800075

Triadic

#4B0082#804A00#00804A

Tints & Shades

Lighter Tints

Darker Shades

WCAG 2.2 Contrast Verification

Against White (#FFFFFF)12.95:1

Sample text rendered with #4B0082 on white

AA Normal: PASSAA Large: PASS

Against Dark (#0F172A)1.38:1

Sample text rendered with #4B0082 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 Indigo (#4B0082)

Indigo (#4B0082) is a distinct shade within the Purple chromatic spectrum. Characterized by an optical luminance of 3% and a cool-warm hybrid (violet) 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#4B0082

RGB Space75, 0, 130

HSL Values275°, 100%, 25%

HSV / HSB275°, 100%, 51%

CMYK Ink42%, 100%, 0%, 49%

TemperatureCool-Warm Hybrid (Violet)

Optical Color Harmony Formulas for Indigo

Geometric intervals calculated from #4B0082 on the 360-degree color wheel.

Direct Polar (180°)#358000

Complementary Harmony

Pairs Indigo with its polar opposite (#358000) to create maximum optical contrast, perfect for high-converting call-to-action buttons.

Adjacent (±30°)#0B0080 · #800075

Analogous Harmony

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

Split Angles (150° / 210°)#758000 · #00800B

Split-Complementary

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

Triangular (120°)#804A00 · #00804A

Triadic Harmony

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

Rectangular (90°)#800B00 · #358000 · #007580

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 Indigo

Lock #4B0082 inside our interactive generator to calculate live matching palettes in real time.

Launch Palette Generator

The 60-30-10 UI Implementation Role for Indigo

Recommended proportional volume and semantic interface assignment.

Recommended Assignment: Interactive Brand Accent (10% Volume)

With a saturation of 100% and lightness of 25%, Indigo (#4B0082) 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

Evokes creative imagination, high-tech futurism, luxury, and opulence. Captivates attention with an aura of boundary-pushing intellect.

Optimal Industry Verticals

Generative AI Platforms, Creative Studios, Web3 Crypto, Luxury Beauty. Combining Indigo with intentional neutral whitespace reinforces authority and conversion clarity.

Production Code Tokens for Indigo

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

CSS Custom Properties (:root)Vanilla CSS

:root {
  --color-4b0082: #4B0082;
  --color-4b0082-rgb: 75, 0, 130;
  --color-4b0082-hsl: 275deg 100% 25%;
}

tailwind.config.jsTailwind CSS

module.exports = {
  theme: {
    extend: {
      colors: {
        '4b0082': '#4B0082',
      }
    }
  }
};

Explore Related Color Tools for Indigo

Continue developing your color system with specialized design tools.

Palette Generator

Generate harmonious 5-color palettes anchored to Indigo.

Launch Tool

WCAG Contrast Checker

Verify Level AA and AAA readability for Indigo against any background.

Check Contrast

Shades & Tints Scale

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

Expand Scale

CSS Gradient Generator

Create linear and radial gradients blending Indigo with complementary hues.

Build Gradients

Frequently Asked Questions About Indigo (#4B0082)

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

What are the exact digital and print color codes for Indigo (#4B0082)?

Indigo is defined by the HEX code #4B0082. Its digital screen RGB coordinates are R:75, G:0, B:130. Its cylindrical HSL values are Hue:275°, Saturation:100%, Lightness:25%. In HSV/HSB format, it is 275°, 100%, 51%. For four-color CMYK process printing, its ink percentages are C:42%, M:100%, Y:0%, K:49%.

Does Indigo (#4B0082) pass WCAG 2.2 accessibility standards for text readability?

Against a pure white (#FFFFFF) background, Indigo achieves a contrast ratio of 12.95:1 (Passing WCAG AA for normal body text, and Passing for large headings). Against dark slate (#0F172A), it achieves a contrast ratio of 1.38:1 (Failing WCAG AA).

What is the direct complementary color for Indigo (#4B0082)?

The exact 180-degree optical complementary color for #4B0082 is #358000. When placed side-by-side, #4B0082 and #358000 create maximum visual tension and high click-through conversion rates.

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

How can I copy and export Indigo into Tailwind CSS and CSS variables?

You can define Indigo in CSS custom properties as ':root { --color-custom: #4B0082; }' or paste it into your 'tailwind.config.js' file under 'theme.extend.colors'. You can also generate full palettes containing Indigo using our interactive Color Palette Generator.

Which color family does Indigo (#4B0082) belong to?

Indigo belongs to the Purple family (Cool-Warm Hybrid (Violet) spectrum). You can explore full tonal ramps and curated palettes in our Purple Color Guide.