Tailwind CSS v3 color

Tailwind purple-950 #3B0764

Tailwind CSS v3's purple-950 is #3B0764. It is a very dark soft violet in the violet family. In OKLCH it sits at lightness 0.291, chroma 0.143 and hue 302.7°. The nearest CSS named color is indigo (#4B0082), ΔE2000 5.2 away.

Relative luminance: 0.0200
OKLCH L · C · h: 0.291 · 0.143 · 302.7
Best text: White 14.99:1
Hue family: Violet

Inspect this color Check contrast

#3B0764 color codes

HEX: #3B0764
RGB: rgb(59, 7, 100)
HSL: hsl(274, 87%, 21%)
OKLCH: oklch(0.291 0.143 302.7)
OKLab: oklab(0.291 0.077 -0.121)
CIELAB (D65): L* 15.50, a* 40.72, b* -42.17
XYZ (D65): X 4.18, Y 2.00, Z 12.22
CMYK (naive): cmyk(41%, 93%, 0%, 61%)

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 #3B0764 accessible?

White text on it reaches 14.99:1, passing AAA. Black text fails at 1.40:1.

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

1.40:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.40:1
White text on it

14.99:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −103
As text on black

1.40:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.40:1
As text on white

14.99:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +100

Nearest versions that pass 4.5:1

For text on white

#3B0764 14.99:1

It already reaches 14.99:1 on white, so no change is needed.
For text on black

#8A61BE 4.53:1

Lightening its OKLCH lightness from 0.29 to 0.58 reaches 4.53:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #3B0764 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 #3B0764

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #3B0764 sits at step 900.

50#F7F3FF

White
1.09
Black
19.21
100#EFE6FF

White
1.20
Black
17.43
200#E0CDFF

White
1.46
Black
14.34
300#CDAAFF

White
1.94
Black
10.78
400#B38AE9

White
2.71
Black
7.72
500#986ECC

White
3.86
Black
5.43
600#8056B2

White
5.39
Black
3.89
700#684097

White
7.58
Black
2.76
800#4E2878

White
11.06
Black
1.89
900This color#3B0764

White
14.99
Black
1.40
950#21003C

White
18.58
Black
1.12

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

Tailwind CSS v3 purple scale

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

50#FAF5FF
White
1.07
Black
19.56
100#F3E8FF
White
1.17
Black
17.79
200#E9D5FF
White
1.36
Black
15.42
300#D8B4FE
White
1.76
Black
11.87
400#C084FC
White
2.64
Black
7.94
500#A855F7
White
3.95
Black
5.30
600#9333EA
White
5.38
Black
3.90
700#7E22CE
White
6.98
Black
3.00
800#6B21A8
White
8.72
Black
2.40
900#581C87
White
10.87
Black
1.93
950This color#3B0764

White
14.99
Black
1.40

Gamut

How vivid #3B0764 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.153; #3B0764 uses 93% of it. Display P3, which many recent phones and laptops show, reaches 0.160 there: 5% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.143
sRGB edge: 0.153
Display P3 edge: 0.160
Rec. 2020 edge: 0.177
Dominant wavelength: Complementary 566 nm
Excitation purity: 68%
Chromaticity: x 0.2271, y 0.1088

This color#3B0764
Most vivid in sRGB#3C0068
Most vivid in Display P3oklch(0.291 0.160 302.7)

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

Use the wider color where screens show it

.accent {
  color: #3b0764;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.2157 0 0.4004); }
}

Mixing

Mixing #3B0764

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%#9D83B2
OKLab50%#9683B2
OKLCH50%#9683B2

Black #000000

sRGB50%#1E0432
OKLab50%#110122
OKLCH50%#110122

Its complement #253100

sRGB50%#301C32
OKLab50%#2F273B
OKLCH50%#00323B

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #3b0764, white);
color: color-mix(in oklch, #3b0764 50%, white);

In use

#3B0764 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, 4.5:114.99:1 Passes
Link and body-size textText, 4.5:114.99:1 Passes
Large headingLarge text, 3:114.99:1 Passes
Icons, borders and focus ringsNon-text, 3:114.99:1 Passes

Dark page

Button labelText, 4.5:114.99:1 Passes
Link and body-size textText, 4.5:11.24:1 Fails
Large headingLarge text, 3:11.24:1 Fails
Icons, borders and focus ringsNon-text, 3:11.24:1 Fails

For text on this page, the nearest shade that passes is #936AC8 4.58:1

Color vision

How #3B0764 looks with color blindness

Achromatopsia changes it most, ΔE2000 25.6; protanopia changes it least, 13.4.

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

#002666 ΔE2000 13.4

Distinct

Reads as very dark soft blue
Deuteranopia

No working green (medium-wavelength) cones

#002662 ΔE2000 13.9

Distinct

Reads as very dark soft blue
Tritanopia

No working blue (short-wavelength) cones

#322439 ΔE2000 16.1

Distinct

Reads as very dark grayish violet
Achromatopsia

No cone color vision; lightness only

#272727 ΔE2000 25.6

Distinct

Reads as near-black

Pairing check

Checked against its complement, #253100. Their lightness contrast is only 1.08:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#3B0764 · #253100	55.7	Stays distinct
Protanopia	#002666 · #352D00	43.6	Stays distinct
Deuteranopia	#002662 · #332D04	42.2	Stays distinct
Tritanopia	#322439 · #282E28	19.5	Stays distinct
Achromatopsia	#272727 · #2D2D2D	1.9	Easily confused

Harmony

Color harmonies for #3B0764

Its complement is #253100, a very dark muted yellow.

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

Open the Harmony Studio

Base#3B0764
Complement#253100

Complementary

Open in Harmony Studio

−30°#191A71
Base#3B0764
+30°#4D0047

Analogous

Open in Harmony Studio

Base#3B0764
+120°#422300
+240°#00342E

Triadic

Open in Harmony Studio

Base#3B0764
+150°#362A00
+210°#003618

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-purple-950: #3b0764;
}

Tailwind config

// tailwind.config.js — already built in as purple-950;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        purple: { 950: '#3b0764' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own purple-950; this pins the v3 value. */
  --color-purple-950: oklch(0.291 0.143 302.7);
}

Design token (W3C DTCG)

{
  "color": {
    "purple-950": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2314, 0.0275, 0.3922],
        "hex": "#3b0764"
      },
      "$description": "Tailwind CSS v3 purple-950"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let purple950 = Color(.sRGB, red: 0.231, green: 0.027, blue: 0.392, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Purple950 = Color(0xFF3B0764)
}

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.

Tools

Open #3B0764 in the tools

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

Tailwind purple-950 #3B0764

#3B0764 color codes

Contrast: is #3B0764 accessible?

Black text on it

White text on it

As text on black

As text on white

Nearest versions that pass 4.5:1

Adjust #3B0764 live

Shades and tints of #3B0764

Tailwind CSS v3 purple scale

How vivid #3B0764 can get

Mixing #3B0764

#3B0764 in an interface

How #3B0764 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #3B0764

Complementary

Analogous

Triadic

Split-complementary

Design tokens

CSS custom property

Tailwind config

Tailwind v4 theme

Design token (W3C DTCG)

SwiftUI color

Jetpack Compose color

The nearest match in each system

Similar colors

Open #3B0764 in the tools