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
#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.
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.
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.
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.
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.
- 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.
.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
/* 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.
| Vision | The pair | ΔE2000 | Verdict |
|---|---|---|---|
| Normal vision | #5B21B6 · #515500 | 67.4 | Stays distinct |
| Protanopia | #004BBA · #5C5000 | 56.6 | Stays distinct |
| Deuteranopia | #0046B3 · #5D520A | 55.8 | Stays distinct |
| Tritanopia | #3D4D6D · #574F47 | 19.4 | Stays distinct |
| Achromatopsia | #494949 · #515151 | 2.7 | Easily 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 StudioCode
Design tokens
Ready-to-paste tokens in six formats. Rename them to fit your system.
:root {
--color-violet-800: #5b21b6;
}// tailwind.config.js — already built in as violet-800;
// pin the v3 value explicitly like this:
module.exports = {
theme: {
extend: {
colors: {
violet: { 800: '#5b21b6' },
},
},
},
};/* 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);
}{
"color": {
"violet-800": {
"$type": "color",
"$value": {
"colorSpace": "srgb",
"components": [0.3569, 0.1294, 0.7137],
"hex": "#5b21b6"
},
"$description": "Tailwind CSS v3 violet-800"
}
}
}import SwiftUI
enum Palette {
static let violet800 = Color(.sRGB, red: 0.357, green: 0.129, blue: 0.714, opacity: 1)
}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.
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.
- Color InspectorEvery format, its names, contrast and color vision in one panel.
- Contrast SystemBlack and white text on this color, with fixes in both directions.
- Harmony StudioPalettes built from this color, walked to a contrast target if you ask.
- Color Space ConverterThe same color in 34 notations, with its gamut headroom.
- Color Name FinderThe nearest of 1,055 color names by ΔE2000.