Indigo 500
indigo-500 · #6366F1
HEX
#6366F1
RGB
rgb(99, 102, 241)
CMYK
cmyk(59%, 58%, 0%, 5%)
HSL
hsl(239, 84%, 67%)
LAB
lab(50.1, 38.7, -70.5)
What is Indigo 500?
Indigo 500 is the indigo-500 reference in the Tailwind CSS palette. Its sRGB value is #6366F1 (rgb 99, 102, 241). It sits in the purple family. The default color palette shipped with Tailwind CSS v3 by Tailwind Labs. 22 color families across 11 lightness steps (50 to 950). See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Indigo 500 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Indigo 500
An 11-step tonal scale derived from Indigo 500 (#6366F1). Click any swatch to copy its HEX. Use these as a starting point for design tokens, hover states, and disabled states in a design system.
50
#F3F3FE
#F3F3FE
100
#E6E7FD
#E6E7FD
200
#CDCEFB
#CDCEFB
300
#B1B3F8
#B1B3F8
400
#8A8CF5
#8A8CF5
500
#6366F1
#6366F1
600
#5457CD
#5457CD
700
#40429D
#40429D
800
#2D2E6C
#2D2E6C
900
#191A3C
#191A3C
950
#0C0C1D
#0C0C1D
Lighter tints (mixed with white)
15%
#8A8CF3
30%
#A7A8F5
45%
#BFBFF7
60%
#D3D3FA
75%
#E5E5FC
Darker shades (mixed with black)
15%
#5C5EE0
30%
#5356CE
45%
#4A4CB9
60%
#3F41A0
75%
#313381
Color harmonies for Indigo 500
Classic color-theory harmonies derived from rotating the hue of Indigo 500. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#6366F1
#6366F1
#F2EF64
#F2EF64
Triadic
Three colors 120° apart
#6366F1
#6366F1
#F26467
#F26467
#67F264
#67F264
Analogous
Two neighbors ±30° on the wheel
#64ADF2
#64ADF2
#6366F1
#6366F1
#A864F2
#A864F2
Split-complementary
Base + two colors flanking its complement
#6366F1
#6366F1
#F2A864
#F2A864
#ADF264
#ADF264
Tetradic
Two complementary pairs
#6366F1
#6366F1
#EF64F2
#EF64F2
#F2EF64
#F2EF64
#67F264
#67F264
Square
Four colors evenly spaced 90° apart
#6366F1
#6366F1
#F264AD
#F264AD
#F2EF64
#F2EF64
#64F2A8
#64F2A8
Indigo 500 in every color space
Full conversion of Indigo 500 across the color spaces designers and developers actually use — including OKLCH (the perceptually-uniform space that powers Tailwind v4 and CSS Color Module Level 4) and HWB.
HEX
#6366F1
RGB
rgb(99, 102, 241)
CMYK
cmyk(59%, 58%, 0%, 5%)
HSL
hsl(239, 84%, 67%)
HSV
hsv(239, 59%, 95%)
HWB
hwb(239 39% 5%)
CIE Lab
lab(50.1 38.7 -70.5)
OKLCH
oklch(58.5% 0.204 277.1)
XYZ (D65)
xyz(25.77, 18.50, 85.42)
Copy-ready code for Indigo 500
Drop-in snippets for CSS, Tailwind, Sass, iOS Swift, and Android XML. Click the copy button on any snippet to put it on your clipboard.
CSS
color: #6366F1;
background-color: #6366F1;CSS variable
:root {
--color-indigo-500: #6366F1;
}Tailwind config
// tailwind.config.js
colors: {
'indigo-500': '#6366F1',
}Sass
$color-indigo-500: #6366F1;Swift UIColor
UIColor(red: 0.388, green: 0.400, blue: 0.945, alpha: 1.0)Android XML
<color name="indigo-500">#6366F1</color>Closest match in every color system
The nearest Indigo 500 equivalent in every other color system on this site, ranked by ΔE2000 perceptual distance. Useful when translating between design-system, web-standard, and industrial color references.
Closest in Tailwind CSS palette
Top 6 ΔE2000-closest entries within the same collection.
Closest Pantone matches
Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.
Closest RAL Classic matches
Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.
RAL 5023
#49678D
Distant blue
RAL 5014
#606E8C
Pigeon blue
RAL 5007
#3E5F8A
Brilliant blue
RAL 5015
#2271B3
Sky blue
RAL 5012
#3B83BD
Light blue
RAL 7000
#7E8B92
Squirrel grey
FAQ about Indigo 500
What is the HEX code for Indigo 500?
Indigo 500 (indigo-500) has the HEX code #6366F1. In RGB it is rgb(99, 102, 241), and in CMYK it is cmyk(59%, 58%, 0%, 5%).
What is the OKLCH value of Indigo 500?
Indigo 500 converts to oklch(0.585 0.204 277.1). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Indigo 500 accessible for body text?
Used as a background, Indigo 500 has a contrast ratio of 4.70:1 with black text and 4.47:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use black text and verify in real UI context.
What is the closest Pantone to Indigo 500?
The closest Pantone reference to Indigo 500 by ΔE2000 perceptual distance is Pantone 7455 C (#3A5DAE). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Indigo 500?
The closest RAL Classic reference to Indigo 500 by ΔE2000 distance is RAL 5023 (Distant blue, #49678D). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Indigo 500?
The complementary color (180° opposite on the HSL color wheel) of Indigo 500 is #F2EF64. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
Tailwind CSS default palette (v3)
The default color palette shipped with Tailwind CSS v3 by Tailwind Labs Inc. Use as a reference for design tokens, web color systems, and Tailwind-based design conversations. Names like 'blue-500' are the project's own naming convention.
- Source type
- derived
- Confidence
- high
- License
- MIT
- Last reviewed
- 2026-05-24
Workflow tags
Tailwind palette values are designed for digital interfaces under sRGB. For print, convert to a process-appropriate value and proof against the substrate; do not rely on sRGB CMYK conversion for color-critical print work.