Tailwind CSS v3 color

Tailwind violet-800 #5B21B6

Tailwind CSS v3's violet-800 is #5B21B6. It is a dark vivid violet in the violet family. In OKLCH it sits at lightness 0.432, chroma 0.211 and hue 292.8°. The nearest CSS named color is rebeccapurple (#663399), ΔE2000 6.2 away.

Relative luminance
0.0669
OKLCH L · C · h
0.432 · 0.211 · 292.8
Best text
White 8.98:1
Hue family
Violet
Inspect this color Check contrast

#5B21B6 color codes

HEX
#5B21B6
RGB
rgb(91, 33, 182)
HSL
hsl(263, 69%, 42%)
OKLCH
oklch(0.432 0.211 292.8)
OKLab
oklab(0.432 0.081 -0.194)
CIELAB (D65)
L* 31.09, a* 56.61, b* -67.61
XYZ (D65)
X 13.30, Y 6.69, Z 44.84
CMYK (naive)
cmyk(50%, 82%, 0%, 29%)

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 #5B21B6 accessible?

White text on it reaches 8.98:1, passing AAA. Black text fails at 2.33:1.

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

    2.33:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +14

  • White text on it

    8.98:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −93

  • As text on black

    2.33:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −12

  • As text on white

    8.98:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +89

Nearest versions that pass 4.5:1

  • For text on white

    #5B21B6 8.98:1

    It already reaches 8.98:1 on white, so no change is needed.

  • For text on black

    #8457E9 4.52:1

    Lightening its OKLCH lightness from 0.43 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 #5B21B6 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 #5B21B6

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #5B21B6 sits at step 700.

  1. 50#F5F3FF
    White
    1.09
    Black
    19.14
  2. 100#EBE8FF
    White
    1.19
    Black
    17.51
  3. 200#D8D0FF
    White
    1.45
    Black
    14.38
  4. 300#C0B0FF
    White
    1.92
    Black
    10.89
  5. 400#A68AFF
    White
    2.72
    Black
    7.70
  6. 500#8F63F7
    White
    3.96
    Black
    5.29
  7. 600#7849DA
    White
    5.57
    Black
    3.76
  8. 700This color#5B21B6
    White
    8.98
    Black
    2.33
  9. 800#4A0F99
    White
    11.54
    Black
    1.81
  10. 900#31006C
    White
    15.58
    Black
    1.34
  11. 950#1B0043
    White
    18.62
    Black
    1.12

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

Tailwind CSS v3 violet scale

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

  1. 50#F5F3FF
    White
    1.09
    Black
    19.14
  2. 100#EDE9FE
    White
    1.18
    Black
    17.68
  3. 200#DDD6FE
    White
    1.38
    Black
    15.12
  4. 300#C4B5FD
    White
    1.84
    Black
    11.37
  5. 400#A78BFA
    White
    2.72
    Black
    7.71
  6. 500#8B5CF6
    White
    4.23
    Black
    4.95
  7. 600#7C3AED
    White
    5.69
    Black
    3.68
  8. 700#6D28D9
    White
    7.10
    Black
    2.95
  9. 800This color#5B21B6
    White
    8.98
    Black
    2.33
  10. 900#4C1D95
    White
    10.95
    Black
    1.91
  11. 950#2E1065
    White
    15.23
    Black
    1.37

Gamut

How vivid #5B21B6 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.241; #5B21B6 uses 88% of it. Display P3, which many recent phones and laptops show, reaches 0.248 there: 3% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.211
sRGB edge
0.241
Display P3 edge
0.248
Rec. 2020 edge
0.271
Dominant wavelength
443 nm
Excitation purity
71%
Chromaticity
x 0.2052, y 0.1032
  • This color#5B21B6
  • Most vivid in sRGB#5E00C4
  • Most vivid in Display P3oklch(0.432 0.248 292.8)

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

Use the wider color where screens show it
.accent {
  color: #5b21b6;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.3374 0 0.7513); }
}

Mixing

Mixing #5B21B6

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%#AD90DB
  • OKLab50%#A597E0
  • OKLCH50%#A597E0

Black #000000

  • sRGB50%#2E115B
  • OKLab50%#1E0644
  • OKLCH50%#1E0644

Its complement #515500

  • sRGB50%#563B5B
  • OKLab50%#514A6D
  • OKLCH50%#005C62
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #5b21b6, white);
color: color-mix(in oklch, #5b21b6 50%, white);

In use

#5B21B6 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, 4.5:18.98:1 Passes
  • Link and body-size textText, 4.5:18.98:1 Passes
  • Large headingLarge text, 3:18.98:1 Passes
  • Icons, borders and focus ringsNon-text, 3:18.98:1 Passes

Dark page

  • Button labelText, 4.5:18.98:1 Passes
  • Link and body-size textText, 4.5:12.08:1 Fails
  • Large headingLarge text, 3:12.08:1 Fails
  • Icons, borders and focus ringsNon-text, 3:12.08:1 Fails

For text on this page, the nearest shade that passes is #8C61F4 4.57:1

Color vision

How #5B21B6 looks with color blindness

Achromatopsia changes it most, ΔE2000 29.6; deuteranopia changes it least, 13.9.

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

    #004BBA ΔE2000 14.9

    Distinct

    Reads as dark vivid blue

  • Deuteranopia

    No working green (medium-wavelength) cones

    #0046B3 ΔE2000 13.9

    Distinct

    Reads as dark vivid blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #3D4D6D ΔE2000 17.9

    Distinct

    Reads as dark muted blue

  • Achromatopsia

    No cone color vision; lightness only

    #494949 ΔE2000 29.6

    Distinct

    Reads as dark gray

Pairing check

Checked against its complement, #515500. Their lightness contrast is only 1.13:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#5B21B6 · #51550067.4Stays distinct
Protanopia#004BBA · #5C500056.6Stays distinct
Deuteranopia#0046B3 · #5D520A55.8Stays distinct
Tritanopia#3D4D6D · #574F4719.4Stays distinct
Achromatopsia#494949 · #5151512.7Easily confused

Harmony

Color harmonies for #5B21B6

Its complement is #515500, a dark muted yellow.

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

Open the Harmony Studio
  • Base#5B21B6
  • Complement#515500

Complementary

Open in Harmony Studio
  • −30°#013EC1
  • Base#5B21B6
  • +30°#80008F

Analogous

Open in Harmony Studio
  • Base#5B21B6
  • +120°#7D3B00
  • +240°#005F4C

Triadic

Open in Harmony Studio
  • Base#5B21B6
  • +150°#684B00
  • +210°#006303

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-violet-800: #5b21b6;
}

Tailwind config

// tailwind.config.js — already built in as violet-800;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        violet: { 800: '#5b21b6' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own violet-800; this pins the v3 value. */
  --color-violet-800: oklch(0.432 0.211 292.8);
}

Design token (W3C DTCG)

{
  "color": {
    "violet-800": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3569, 0.1294, 0.7137],
        "hex": "#5b21b6"
      },
      "$description": "Tailwind CSS v3 violet-800"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let violet800 = Color(.sRGB, red: 0.357, green: 0.129, blue: 0.714, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Violet800 = Color(0xFF5B21B6)
}

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 #5B21B6 in the tools

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