Indigo 400
indigo-400 · #818CF8
HEX
#818CF8
RGB
rgb(129, 140, 248)
CMYK
cmyk(48%, 44%, 0%, 3%)
HSL
hsl(234, 89%, 74%)
LAB
lab(61.8, 24.2, -55.4)
What is Indigo 400?
Indigo 400 is the indigo-400 reference in the Tailwind CSS palette. Its sRGB value is #818CF8 (rgb 129, 140, 248). 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 400 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Indigo 400
An 11-step tonal scale derived from Indigo 400 (#818CF8). 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
#F5F6FE
#F5F6FE
100
#EBEDFE
#EBEDFE
200
#D7DAFD
#D7DAFD
300
#C0C6FC
#C0C6FC
400
#A1A9FA
#A1A9FA
500
#818CF8
#818CF8
600
#6E77D3
#6E77D3
700
#545BA1
#545BA1
800
#3A3F70
#3A3F70
900
#20233E
#20233E
950
#0F111E
#0F111E
Lighter tints (mixed with white)
15%
#9DA4F9
30%
#B4B9FA
45%
#C7CBFB
60%
#D8DBFC
75%
#E8E9FD
Darker shades (mixed with black)
15%
#7882E7
30%
#6D77D4
45%
#616ABE
60%
#545BA5
75%
#424885
Color harmonies for Indigo 400
Classic color-theory harmonies derived from rotating the hue of Indigo 400. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#818CF8
#818CF8
#F8EC82
#F8EC82
Triadic
Three colors 120° apart
#818CF8
#818CF8
#F8828D
#F8828D
#8DF882
#8DF882
Analogous
Two neighbors ±30° on the wheel
#82C9F8
#82C9F8
#818CF8
#818CF8
#B182F8
#B182F8
Split-complementary
Base + two colors flanking its complement
#818CF8
#818CF8
#F8B182
#F8B182
#C9F882
#C9F882
Tetradic
Two complementary pairs
#818CF8
#818CF8
#EC82F8
#EC82F8
#F8EC82
#F8EC82
#8DF882
#8DF882
Square
Four colors evenly spaced 90° apart
#818CF8
#818CF8
#F882C9
#F882C9
#F8EC82
#F8EC82
#82F8B1
#82F8B1
Indigo 400 in every color space
Full conversion of Indigo 400 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
#818CF8
RGB
rgb(129, 140, 248)
CMYK
cmyk(48%, 44%, 0%, 3%)
HSL
hsl(234, 89%, 74%)
HSV
hsv(234, 48%, 97%)
HWB
hwb(234 51% 3%)
CIE Lab
lab(61.8 24.2 -55.4)
OKLCH
oklch(68.0% 0.158 276.9)
XYZ (D65)
xyz(35.37, 30.20, 92.75)
Copy-ready code for Indigo 400
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: #818CF8;
background-color: #818CF8;CSS variable
:root {
--color-indigo-400: #818CF8;
}Tailwind config
// tailwind.config.js
colors: {
'indigo-400': '#818CF8',
}Sass
$color-indigo-400: #818CF8;Swift UIColor
UIColor(red: 0.506, green: 0.549, blue: 0.973, alpha: 1.0)Android XML
<color name="indigo-400">#818CF8</color>Closest match in every color system
The nearest Indigo 400 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 5012
#3B83BD
Light blue
RAL 7000
#7E8B92
Squirrel grey
RAL 7001
#8F999F
Silver grey
RAL 5014
#606E8C
Pigeon blue
RAL 5015
#2271B3
Sky blue
RAL 7040
#9DA1AA
Window grey
FAQ about Indigo 400
What is the HEX code for Indigo 400?
Indigo 400 (indigo-400) has the HEX code #818CF8. In RGB it is rgb(129, 140, 248), and in CMYK it is cmyk(48%, 44%, 0%, 3%).
What is the OKLCH value of Indigo 400?
Indigo 400 converts to oklch(0.680 0.158 276.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Indigo 400 accessible for body text?
Used as a background, Indigo 400 has a contrast ratio of 7.04:1 with black text and 2.98:1 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 400?
The closest Pantone reference to Indigo 400 by ΔE2000 perceptual distance is Pantone 270 C (#A696D4). 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 400?
The closest RAL Classic reference to Indigo 400 by ΔE2000 distance is RAL 5012 (Light blue, #3B83BD). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Indigo 400?
The complementary color (180° opposite on the HSL color wheel) of Indigo 400 is #F8EC82. 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.