Tints & Shades
50
100
200
300
400
500
600
700
800
900
Scale from white (50) through Indigo (500) to black (900), interpolated in Lab color space.
Color Values
- HEX
- #4B0082
- RGB
- rgb(75, 0, 130)
- HSL
- hsl(275, 100%, 25%)
- OKLCH
- oklch(0.339 0.179 302)
- CMYK
- cmyk(42%, 100%, 0%, 49%)
--color-indigobg-[#4B0082]Accessibility
Score: 96/100On White (#FFF)
12.95:1
On Black (#000)
1.62:1
On Light Gray (#F5F5F5)
11.88:1
Best text color on this background:
Design Applications
background-color: #4B0082
color: #4B0082
bg-[#4B0082] text-[#FFFFFF]
border-left: 4px solid #4B0082
Color Harmonies
Complementary
Laurel Green
#A9BA9D
Split-Complementary
Similar Colors
Color Meaning & Psychology
Indigo sits between blue and violet on the spectrum — visible in rainbows as the penultimate color. Named for the dye plant that once drove an entire colonial economy, indigo carries depth and a historical significance. In digital design (Tailwind's indigo-600 is #4F46E5), it has become the dominant color for modern SaaS brands because it combines blue's trust with purple's ambition.
Industry Usage
Common contexts and industries where Indigo is applied in professional design.
- SaaS and developer tool branding
- AI and machine learning product design
- Premium digital subscription services
- Spiritual and metaphysical practices
- Textile heritage and artisanal fashion
- Academic philosophy and social research brands
Accessibility Considerations
Normal Text
Passes AA
4.5:1 minimum required
Large Text
Passes AA Large
3:1 minimum required
UI Components
Meets 1.4.11
3:1 for non-text UI
Indigo is a dark color. Use white (#FFFFFF) text on top of it for maximum readability (12.95:1). Avoid small black text on this background.
CSS & Code Examples
Background
background-color: #4B0082;Text
color: #4B0082;Border
border: 2px solid #4B0082;Box Shadow
box-shadow: 0 4px 20px #4B008240;Gradient
background: linear-gradient(135deg, #4B0082, #7d38b3);Tailwind-style
--color-indigo: #4B0082;Tailwind CSS Utilities
Use arbitrary value syntax in Tailwind CSS to apply Indigo without a custom config.
Background
bg-[#4B0082]Text
text-[#4B0082]Border
border-[#4B0082]Ring
ring-[#4B0082]Fill
fill-[#4B0082]From (gradient)
from-[#4B0082]Via (gradient)
via-[#4B0082]To (gradient)
to-[#4B0082]Design Tokens
Ready-to-use Indigo design token in CSS custom properties, SCSS, Tailwind v3/v4, and JSON formats.
CSS Custom Properties
:root {
--color-indigo: #4B0082;
--color-indigo-rgb: 75, 0, 130;
--color-indigo-hsl: 275, 100%, 25%;
}SCSS Variables
$color-indigo: #4B0082; $color-indigo-rgb: 75, 0, 130; $color-indigo-hsl: 275, 100%, 25%;
Tailwind v3 Config
// tailwind.config.js
module.exports = {
theme: {
extend: {
colors: {
'indigo': '#4B0082',
},
},
},
};Tailwind v4 (@theme)
/* tailwind.css */
@theme {
--color-indigo: #4B0082;
}JSON Design Token (W3C format)
{
"indigo": {
"value": "#4B0082",
"type": "color",
"description": "Indigo — #4B0082"
}
}Related Palettes & Combinations
Color Combinations
Accessible Color Pairs
More purple colors
View all →What Does Indigo Mean? Color Psychology & Cultural Symbolism
The creative industries reached a consensus about purple long before neuroscience confirmed it: the color activates imaginative thinking and novelty-seeking responses. Indigo at #4B0082 channels this quality as sophistication, creating a sense of possibility that no other hue quite replicates.
- Across color psychology research, purple consistently tests high for "luxury" associations, making Indigo a reliable vehicle for sophistication in cross-demographic audiences.
- Brand designers draw on purple-family tones to project distinction and wisdom—values that Indigo communicates in a deep key.
- At 100% saturation, Indigo reads as vivid—Vivid purples—electric violet, magenta-leaning—signal digital creativity, gaming culture, and technological imagination; they are the purples of sci-fi, crypto, and creative tools.
- Indigo's deep lightness (25%) shifts its psychological register: Deep violet and plum tones carry maximal luxury and mystery—positioned at the intersection of black's power and purple's creativity, excellent for premium and high-fashion applications.
Indigo earns its place in design the same way it earned it in history: through rarity, confidence, and the willingness to be extraordinary.
How to Use Indigo in Design: Applications, Pairings & Best Practices
The design applications of Indigo center on premium positioning. Whether in packaging, digital product, or brand identity, it signals that what's inside is worth more attention than the ordinary.
- Avoid: mainstream corporate environments where it reads as unconventional, food packaging (no natural purple vegetables beyond eggplant and berries), and mass-market consumer products where premium positioning is not intended.
- Color harmonies: Indigo's complementary color creates a high-energy split ideal for promotional design; its analogous palette (±30° hue) builds cohesive, monochromatic sophistication.
- Proportional use: Indigo's vivid saturation (100%) means small applications—accents, highlights, icons—deliver maximum impact without visual fatigue. Reserve large-scale use for intentional brand moments.
- As a dark tone, Indigo creates maximum contrast with white and light neutrals—excellent for creating premium dark-mode sections, bold headers, and high-drama brand moments
- Typography: Indigo works as a background behind white text but requires careful sizing—test at intended heading and body sizes before finalizing.
Indigo earns its place in design the same way it earned it in history: through rarity, confidence, and the willingness to be extraordinary.
Indigo Accessibility: WCAG Contrast Ratios, Color Blindness & Inclusive Design
Indigo (#4B0082) achieves a 12.95:1 contrast ratio with white text, surpassing the WCAG 2.1 AAA threshold of 7:1. This exceptional contrast qualifies it for body text, UI components at any size, and all accessibility-sensitive interface contexts. Relative luminance: 3.1%.
- As text on white (#FFFFFF): 12.95:1 — AAA ✓
- As text on black (#000000): 1.62:1 — Fail
- Best text color on Indigo background: White (#FFFFFF) at 12.95:1
- WCAG 2.1 luminance: 3.1% — low luminance (dark)—it provides strong contrast for white and light overlaid text, functioning well as a background in dark-mode and header contexts
- Indigo qualifies for all text sizes including small body copy (AAA).
- Color blindness consideration: tritanopia (blue-yellow color blindness, ~0.003% of population) may affect how this color reads. While rare, for maximum accessibility supplement color signals with text or icon indicators in critical states.
Indigo's WCAG profile makes it a compliant choice for most text applications.
Indigo in Industry: Branding, Design & Market Applications
Across industry research, purple-family tones consistently outperform competitors in categories built on luxury, creativity, mystery, and wisdom. Indigo is a deep expression of this advantage—best positioned in Beauty & Cosmetics and adjacent markets.
- Beauty & Cosmetics: Purple is the second most common color in beauty branding, projecting luxury, femininity, and transformative aspiration. It signals that a product is special, premium, and designed for moments of indulgence. (examples: Drunk Elephant, Tatcha, Rare Beauty) Lavender tones work for accessible beauty; deep violet and plum for luxury skincare and perfume.
- Creative & Agency Services: Creative studios, design agencies, and advertising firms use purple to signal imagination, unconventional thinking, and creative authority. It differentiates them from the blue-dominated corporate world while retaining enough gravitas to command respect. Works best when paired with a strong neutral (black, charcoal, or cream) to prevent it from reading as whimsical.
- Gaming & Entertainment: Purple dominates gaming, streaming, and digital entertainment branding because it signals the threshold between the ordinary world and an imaginative one. It's the color of portals, magic systems, and premium digital experiences. (examples: Disney+, Hulu, Netflix) Twitch's purple brand has made the color synonymous with live streaming culture—worth considering in adjacent spaces.
- Brand positioning: Indigo is best suited for brands projecting distinction, wisdom, imagination. Categories outside this positioning—mainstream corporate environments where it reads as unconventional—tend to see weaker results.
- Adjacent applications: Beyond primary industries, Indigo works effectively in cryptocurrency projects, gaming UIs, spiritual and wellness platforms—contexts where luxury serves a secondary but reinforcing role.
Indigo earns its strongest ROI in industries where trust and recognition compound over time: Beauty & Cosmetics, Creative & Agency Services, Gaming & Entertainment. Use it to build the kind of brand recognition that decades reinforce.
Accessibility & Design Guides
Frequently Asked Questions
- What is the hex code for Indigo? ▾
- The hex code for Indigo is #4B0082. Its RGB values are rgb(75, 0, 130) and its HSL values are hsl(275, 100%, 25%).
- What does Indigo mean in design? ▾
- Indigo sits between blue and violet on the spectrum — visible in rainbows as the penultimate color. Named for the dye plant that once drove an entire colonial economy, indigo carries depth and a historical significance. In digital design (Tailwind's indigo-600 is #4F46E5), it has become the dominant color for modern SaaS brands because it combines blue's trust with purple's ambition.
- Is Indigo WCAG accessible? ▾
- Indigo (#4B0082) passes WCAG AAA on white with a 12.95:1 contrast ratio. Its overall accessibility score is 96/100.
- What colors go well with Indigo? ▾
- Indigo pairs well with its complementary color Laurel Green (#A9BA9D). Analogous colors like Federal Blue and Medium Purple also work harmoniously. Check the Color Harmonies section above for the full palette.
- What is Indigo used for? ▾
- Indigo is commonly used for: SaaS and developer tool branding; AI and machine learning product design; Premium digital subscription services; Spiritual and metaphysical practices; Textile heritage and artisanal fashion.
- What are the CSS and Tailwind values for Indigo? ▾
- In CSS, use `color: #4B0082` or `background-color: #4B0082`. The CSS custom property is `--color-indigo: #4B0082`. In Tailwind CSS, use the arbitrary value class `bg-[#4B0082]` for backgrounds or `text-[#4B0082]` for text.