Tailwind CSS v3 color
Tailwind indigo-700 #4338CA
Tailwind CSS v3's indigo-700 is #4338CA. It is a dark vivid blue in the blue family. In OKLCH it sits at lightness 0.457, chroma 0.215 and hue 277.0°. The nearest CSS named color is blue (#0000FF), ΔE2000 7.6 away.
- Relative luminance
- 0.0829
- OKLCH L · C · h
- 0.457 · 0.215 · 277.0
- Best text
- White 7.90:1
- Hue family
- Blue
#4338CA color codes
- HEX
#4338CA- RGB
rgb(67, 56, 202)- HSL
hsl(245, 58%, 51%)- OKLCH
oklch(0.457 0.215 277.0)- OKLab
oklab(0.457 0.026 -0.213)- CIELAB (D65)
L* 34.57, a* 48.49, b* -73.72- XYZ (D65)
X 14.39, Y 8.28, Z 56.71- CMYK (naive)
cmyk(67%, 72%, 0%, 21%)
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 #4338CA accessible?
White text on it reaches 7.90:1, passing AAA. Black text fails at 2.65:1.
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
2.65:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +17
-
White text on it
7.90:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −91
-
As text on black
2.65:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −15
-
As text on white
7.90:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +86
Nearest versions that pass 4.5:1
-
For text on white
#4338CA 7.90:1
It already reaches 7.90:1 on white, so no change is needed.
-
For text on black
#6061F4 4.51:1
Lightening its OKLCH lightness from 0.46 to 0.58 reaches 4.51:1 on black, keeping the hue.
Checking another pair? Use the Contrast Checker.
Studio
Adjust #4338CA 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 #4338CA
Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #4338CA sits at step 700.
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.
Gamut
How vivid #4338CA can get
At its lightness and hue, sRGB reaches OKLCH chroma 0.283; #4338CA uses 76% of it. Display P3 reaches no further at this hue.
- sRGB
- Display P3
- Rec. 2020
- Dominant wavelength
- OKLCH chroma
- 0.215
- sRGB edge
- 0.283
- Display P3 edge
- 0.286
- Rec. 2020 edge
- 0.306
- Dominant wavelength
- 462 nm
- Excitation purity
- 76%
- Chromaticity
- x 0.1812, y 0.1044
- This color#4338CA
- Most vivid in sRGB#4600EE
- Most vivid in Display P3oklch(0.457 0.286 277.0)
On a screen without Display P3 the last tile shows the sRGB edge instead.
.accent {
color: #4338ca;
}
@media (color-gamut: p3) {
.accent { color: color(display-p3 0.2474 0 0.9016); }
}Mixing
Mixing #4338CA
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%#A19CE5
- OKLab50%#96A1EA
- OKLCH50%#96A1EA
Black #000000
- sRGB50%#221C65
- OKLab50%#140F4D
- OKLCH50%#140F4D
Its complement #665700
- sRGB50%#554865
- OKLab50%#4E5479
- OKLCH50%#00655F
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #4338ca, white);
color: color-mix(in oklch, #4338ca 50%, white);In use
#4338CA 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, 4.5:17.90:1 Passes
- Link and body-size textText, 4.5:17.90:1 Passes
- Large headingLarge text, 3:17.90:1 Passes
- Icons, borders and focus ringsNon-text, 3:17.90:1 Passes
Dark page
- Button labelText, 4.5:17.90:1 Passes
- Link and body-size textText, 4.5:12.37:1 Fails
- Large headingLarge text, 3:12.37:1 Fails
- Icons, borders and focus ringsNon-text, 3:12.37:1 Fails
For text on this page, the nearest shade that passes is #686BFE 4.56:1
Color vision
How #4338CA looks with color blindness
Achromatopsia changes it most, ΔE2000 29.6; deuteranopia changes it least, 8.0.
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
#0057CE ΔE2000 11.3
Distinct
Reads as vivid blue
-
Deuteranopia
No working green (medium-wavelength) cones
#004BC7 ΔE2000 8.0
Noticeable
Reads as dark vivid blue
-
Tritanopia
No working blue (short-wavelength) cones
#00617E ΔE2000 19.7
Distinct
Reads as dark muted blue
-
Achromatopsia
No cone color vision; lightness only
#515151 ΔE2000 29.6
Distinct
Reads as dark gray
Pairing check
Checked against its complement, #665700. Their lightness contrast is only 1.10:1, so where hue collapses, add a label, icon or pattern.
| Vision | The pair | ΔE2000 | Verdict |
|---|---|---|---|
| Normal vision | #4338CA · #665700 | 62.2 | Stays distinct |
| Protanopia | #0057CE · #615500 | 58.0 | Stays distinct |
| Deuteranopia | #004BC7 · #655A08 | 59.2 | Stays distinct |
| Tritanopia | #00617E · #6F4F49 | 35.8 | Stays distinct |
| Achromatopsia | #515151 · #575757 | 2.1 | Easily confused |
Harmony
Color harmonies for #4338CA
Its complement is #665700, a dark muted 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#4338CA
- Complement#665700
Complementary
Open in Harmony Studio- −30°#005B96
- Base#4338CA
- +30°#771BB1
Analogous
Open in Harmony Studio- Base#4338CA
- +120°#992B00
- +240°#00693E
Triadic
Open in Harmony Studio- Base#4338CA
- +150°#7C4A00
- +210°#456200
Split-complementary
Open in Harmony StudioCode
Design tokens
Ready-to-paste tokens in six formats. Rename them to fit your system.
:root {
--color-indigo-700: #4338ca;
}// tailwind.config.js — already built in as indigo-700;
// pin the v3 value explicitly like this:
module.exports = {
theme: {
extend: {
colors: {
indigo: { 700: '#4338ca' },
},
},
},
};/* app.css — Tailwind CSS v4 */
@import "tailwindcss";
@theme {
/* v4 has its own indigo-700; this pins the v3 value. */
--color-indigo-700: oklch(0.457 0.215 277.0);
}{
"color": {
"indigo-700": {
"$type": "color",
"$value": {
"colorSpace": "srgb",
"components": [0.2627, 0.2196, 0.7922],
"hex": "#4338ca"
},
"$description": "Tailwind CSS v3 indigo-700"
}
}
}import SwiftUI
enum Palette {
static let indigo700 = Color(.sRGB, red: 0.263, green: 0.220, blue: 0.792, opacity: 1)
}import androidx.compose.ui.graphics.Color
object Palette {
val Indigo700 = Color(0xFF4338CA)
}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 #4338CA 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.