Tailwind CSS v3 color

Tailwind indigo-600 #4F46E5

Tailwind CSS v3's indigo-600 is #4F46E5. It is a vivid blue in the blue family. In OKLCH it sits at lightness 0.511, chroma 0.230 and hue 277.0°. The nearest CSS named color is slateblue (#6A5ACD), ΔE2000 6.9 away.

Relative luminance
0.1170
OKLCH L · C · h
0.511 · 0.230 · 277.0
Best text
White 6.28:1
Hue family
Blue
Inspect this color Check contrast

#4F46E5 color codes

HEX
#4F46E5
RGB
rgb(79, 70, 229)
HSL
hsl(243, 75%, 59%)
OKLCH
oklch(0.511 0.230 277.0)
OKLab
oklab(0.511 0.028 -0.228)
CIELAB (D65)
L* 40.73, a* 50.63, b* -79.08
XYZ (D65)
X 19.55, Y 11.70, Z 75.34
CMYK (naive)
cmyk(66%, 69%, 0%, 10%)

CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.

Legibility

Contrast: is #4F46E5 accessible?

White text on it reaches 6.28:1, passing AA. Black text manages only 3.33:1, enough for large text only.

WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.

Open the Contrast System

  • Black text on it

    3.33:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc +23

  • White text on it

    6.28:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc −85

  • As text on black

    3.33:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc −21

  • As text on white

    6.28:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc +80

Nearest versions that pass 4.5:1

  • For text on white

    #4F46E5 6.28:1

    It already reaches 6.28:1 on white, so no change is needed.

  • For text on black

    #605EFE 4.52:1

    Lightening its OKLCH lightness from 0.51 to 0.58 reaches 4.52:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #4F46E5 live

Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.

The studio needs JavaScript.

Scale

Shades and tints of #4F46E5

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #4F46E5 sits at step 600.

  1. 50#F2F4FF
    White
    1.09
    Black
    19.15
  2. 100#E6EAFF
    White
    1.19
    Black
    17.57
  3. 200#CDD5FF
    White
    1.44
    Black
    14.55
  4. 300#ADB8FF
    White
    1.89
    Black
    11.07
  5. 400#8A96FF
    White
    2.66
    Black
    7.88
  6. 500#6C71FF
    White
    3.85
    Black
    5.44
  7. 600This color#4F46E5
    White
    6.28
    Black
    3.33
  8. 700#4436D0
    White
    7.82
    Black
    2.68
  9. 800#3115AB
    White
    11.50
    Black
    1.82
  10. 900#1F007B
    White
    15.62
    Black
    1.34
  11. 950#10004C
    White
    18.64
    Black
    1.12

Under each step, white and black text on it; a bold figure passes 4.5:1.

Tailwind CSS v3 indigo scale

The real Tailwind palette, for comparison with the computed ramp above.

  1. 50#EEF2FF
    White
    1.11
    Black
    18.78
  2. 100#E0E7FF
    White
    1.23
    Black
    17.04
  3. 200#C7D2FE
    White
    1.49
    Black
    14.07
  4. 300#A5B4FC
    White
    1.99
    Black
    10.53
  5. 400#818CF8
    White
    2.98
    Black
    7.04
  6. 500#6366F1
    White
    4.46
    Black
    4.70
  7. 600This color#4F46E5
    White
    6.28
    Black
    3.33
  8. 700#4338CA
    White
    7.90
    Black
    2.65
  9. 800#3730A3
    White
    9.93
    Black
    2.11
  10. 900#312E81
    White
    11.42
    Black
    1.83
  11. 950#1E1B4B
    White
    15.98
    Black
    1.31

Gamut

How vivid #4F46E5 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.278; #4F46E5 uses 83% of it. Display P3, which many recent phones and laptops show, reaches 0.297 there: 7% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.230
sRGB edge
0.278
Display P3 edge
0.297
Rec. 2020 edge
0.301
Dominant wavelength
463 nm
Excitation purity
75%
Chromaticity
x 0.1834, y 0.1097
  • This color#4F46E5
  • Most vivid in sRGB#5030FF
  • Most vivid in Display P3oklch(0.511 0.297 277.0)

On a screen without Display P3 the last tile shows the sRGB edge instead.

Use the wider color where screens show it
.accent {
  color: #4f46e5;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.2929 0.1393 1); }
}

Mixing

Mixing #4F46E5

Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.

White #FFFFFF

  • sRGB50%#A7A3F2
  • OKLab50%#9DA9F8
  • OKLCH50%#9DA9F8

Black #000000

  • sRGB50%#282373
  • OKLab50%#191558
  • OKLCH50%#191558

Its complement #776600

  • sRGB50%#635673
  • OKLab50%#5D638A
  • OKLCH50%#00766F
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #4f46e5, white);
color: color-mix(in oklch, #4f46e5 50%, white);

In use

#4F46E5 in an interface

A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.

Light page

  • Button labelText, 4.5:16.28:1 Passes
  • Link and body-size textText, 4.5:16.28:1 Passes
  • Large headingLarge text, 3:16.28:1 Passes
  • Icons, borders and focus ringsNon-text, 3:16.28:1 Passes

Dark page

  • Button labelText, 4.5:16.28:1 Passes
  • Link and body-size textText, 4.5:12.97:1 Fails
  • Large headingLarge text, 3:12.97:1 Fails
  • Icons, borders and focus ringsNon-text, 3:12.97:1 Fails

For text on this page, the nearest shade that passes is #676AFF 4.53:1

Color vision

How #4F46E5 looks with color blindness

Achromatopsia changes it most, ΔE2000 30.2; deuteranopia changes it least, 8.4.

Simulated with Machado et al. (2009) at full severity, in linear light.

Simulate a whole page What each type sees

  • Protanopia

    No working red (long-wavelength) cones

    #0067EA ΔE2000 12.3

    Distinct

    Reads as vivid blue

  • Deuteranopia

    No working green (medium-wavelength) cones

    #0059E2 ΔE2000 8.4

    Noticeable

    Reads as vivid blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #007190 ΔE2000 21.4

    Distinct

    Reads as muted blue

  • Achromatopsia

    No cone color vision; lightness only

    #606060 ΔE2000 30.2

    Distinct

    Reads as dark gray

Pairing check

Checked against its complement, #776600. Their lightness contrast is only 1.10:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#4F46E5 · #77660064.9Stays distinct
Protanopia#0067EA · #72630060.3Stays distinct
Deuteranopia#0059E2 · #76690C61.7Stays distinct
Tritanopia#007190 · #825D5638.3Stays distinct
Achromatopsia#606060 · #6767672.6Easily confused

Harmony

Color harmonies for #4F46E5

Its complement is #776600, a soft brown, on the warm side of the wheel.

Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.

Open the Harmony Studio
  • Base#4F46E5
  • Complement#776600

Complementary

Open in Harmony Studio
  • −30°#006AAE
  • Base#4F46E5
  • +30°#8928C9

Analogous

Open in Harmony Studio
  • Base#4F46E5
  • +120°#B23300
  • +240°#007A49

Triadic

Open in Harmony Studio
  • Base#4F46E5
  • +150°#905700
  • +210°#527300

Split-complementary

Open in Harmony Studio

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-indigo-600: #4f46e5;
}

Tailwind config

// tailwind.config.js — already built in as indigo-600;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        indigo: { 600: '#4f46e5' },
      },
    },
  },
};

Tailwind v4 theme

/* app.css — Tailwind CSS v4 */
@import "tailwindcss";

@theme {
  /* v4 has its own indigo-600; this pins the v3 value. */
  --color-indigo-600: oklch(0.511 0.230 277.0);
}

Design token (W3C DTCG)

{
  "color": {
    "indigo-600": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3098, 0.2745, 0.898],
        "hex": "#4f46e5"
      },
      "$description": "Tailwind CSS v3 indigo-600"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let indigo600 = Color(.sRGB, red: 0.310, green: 0.275, blue: 0.898, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Indigo600 = Color(0xFF4F46E5)
}

Matches

The nearest match in each system

The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.

Neighbors

The eight nearest colors on this site by ΔE2000, closest first. Under 2 is hard to tell apart side by side.

Tools

Open #4F46E5 in the tools

Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.