Tailwind CSS v4 default palette
Tailwind red-600: #E7000B
In Tailwind CSS v4, red-600 is defined as --color-red-600: oklch(57.7% 0.245 27.325), which is #E7000B in hex and rgb(231, 0, 11): a medium-dark, vivid red. In Tailwind v3, red-600 was #DC2626.
In OKLCH, red-600 has a lightness of 57.7%, chroma 0.245 and hue 27.3°. It is the most saturated shade of the red scale.
This OKLCH value lies outside sRGB. The hex #E7000B is the sRGB fallback from the CSS Color 4 gamut mapping algorithm; on Display P3 screens browsers show a more saturated color, close to color(display-p3 0.8303 0.1404 0.1332).
In v3, red-600 was #DC2626. The v4 value is ΔE OK 3.0 away; v4 is more saturated.
Tailwind red is the default choice for errors and destructive actions; the 600 and 700 shades are the usual picks for text and buttons on white.
Color codes for red-600
| Tailwind v4 token | --color-red-600 |
|---|---|
| OKLCH (source value) | oklch(57.7% 0.245 27.325) |
| HEX | #E7000B |
| RGB | rgb(231, 0, 11) |
| HSL | hsl(357, 100%, 45%) |
| HWB | hwb(357 0% 9%) |
| CMYK (naive, no ICC profile) | cmyk(0%, 100%, 95%, 9%) |
| Decimal | 15,138,827 |
| Display P3 | color(display-p3 0.8303 0.1404 0.1332) |
| Tailwind v3 hex | #DC2626 |
| Utility classes | bg-red-600, text-red-600, border-red-600 |
Tailwind red scale
Contrast and accessibility
On red-600, white text has a contrast ratio of 4.76:1 and passes AA for normal text; black text reaches 4.40:1.
WCAG 2.2 contrast ratios (success criteria 1.4.3 and 1.4.6: AA needs 4.5:1 for normal text and 3:1 for large text, AAA needs 7:1 and 4.5:1). APCA Lc is the lightness contrast from the APCA-W3 0.0.98G model proposed for WCAG 3; a higher absolute value is more readable, and Lc 75 is its suggested minimum for body text.
| Pair | Ratio | AA | AA large | AAA | AAA large | APCA Lc |
|---|---|---|---|---|---|---|
| Black text on red-600 | 4.40:1 | Fail | Pass | Fail | Fail | 34.0 |
| White text on red-600 | 4.76:1 | Pass | Pass | Fail | Pass | −75.6 |
| Red-600 text on white | 4.76:1 | Pass | Pass | Fail | Pass | 70.1 |
| Red-600 text on black | 4.40:1 | Fail | Pass | Fail | Fail | −31.6 |
Tints and shades
Each step mixes var(--color-red-600) with white (tints) or black (shades) in gamma-encoded sRGB, the same result as color-mix(in srgb, var(--color-red-600), white 25%) in CSS.
Tints (mixed with white)
- 5%
#e80d17 - 15%
#eb2630 - 25%
#ed4048 - 35%
#ef5960 - 45%
#f27379 - 55%
#f48c91 - 65%
#f7a6aa - 75%
#f9bfc2 - 85%
#fbd9da - 95%
#fef2f3
Shades (mixed with black)
- 5%
#db000a - 15%
#c40009 - 25%
#ad0008 - 35%
#960007 - 45%
#7f0006 - 55%
#680005 - 65%
#510004 - 75%
#3a0003 - 85%
#230002 - 95%
#0c0001
Color harmonies
Rotating the hue in OKLCH while keeping lightness and chroma, red-600's complementary color is #008C9D (close to darkcyan), its analogous colors are #DD007B and #BD5A00, and its triadic partners are #00971D and #3C63FF. For text on top, white gives the higher contrast.
| Harmony | Rotation | Color |
|---|---|---|
| Complementary | +180° | #008c9d |
| Analogous | −30°, +30° | #dd007b#bd5a00 |
| Triadic | +120°, +240° | #00971d#3c63ff |
| Split-complementary | +150°, +210° | #009178#0083c7 |
Computed in OKLCH: the hue is rotated by 180° (complementary), ±30° (analogous), ±120° (triadic) and 180° ±30° (split-complementary) while lightness and chroma stay fixed. Results that fall outside sRGB are brought back with the CSS Color 4 gamut mapping algorithm. Because this uses OKLCH, the values differ from tools that rotate hue in HSL, but every color keeps the same perceived lightness.
Warm or cool?
Tailwind red-600 is a warm color: its hue is 357° on the HSL wheel, in the red, orange and yellow range (0° to about 70°, plus reds above 330°) that is conventionally called warm.
Nearest named and Tailwind colors
Distance is ΔE OK, the Euclidean distance in OKLab multiplied by 100. Values under about 2 are hard to tell apart side by side.
Code snippets
<div class="bg-red-600 text-white">...</div>
<p class="text-red-600 border-red-600">...</p>.element {
color: var(--color-red-600);
background-color: oklch(57.7% 0.245 27.325);
border-color: #e7000b;
outline-color: rgb(231 0 11);
}import SwiftUI
extension Color {
static let red600 = Color(red: 0.906, green: 0.000, blue: 0.043)
}import androidx.compose.ui.graphics.Color
val Red600 = Color(0xFFE7000B)import 'package:flutter/material.dart';
const red600 = Color(0xFFE7000B);<!-- res/values/colors.xml -->
<color name="red_600">#E7000B</color>Frequently asked questions
- What is the hex code for Tailwind red-600?
- In Tailwind CSS v4, red-600 is oklch(57.7% 0.245 27.325), which converts to #E7000B (rgb(231, 0, 11)) in sRGB after gamut mapping, because the OKLCH value is outside sRGB. In Tailwind v3 the same name was #DC2626.
- What is the difference between red-600 in Tailwind v3 and v4?
- v3 used the hex #DC2626; v4 redefined the palette in OKLCH as oklch(57.7% 0.245 27.325). In v3, red-600 was #DC2626. The v4 value is ΔE OK 3.0 away; v4 is more saturated.
- How do I use red-600 in plain CSS?
- Tailwind v4 defines every palette color as a theme variable, so in CSS you write var(--color-red-600). By default Tailwind only emits the variables your project uses; @theme static emits all of them.
- Can you use white text on red-600?
- White text on red-600 has a contrast ratio of 4.76:1, which passes AA for normal text but not AAA under WCAG 2.2. Black text reaches 4.40:1 and passes AA only for large text (24 px, or 18.66 px bold, and up). In APCA terms that is Lc −75.6 for white and Lc 34.0 for black.
- Which CSS named color is closest to red-600?
- The closest is crimson (#DC143C) at ΔE OK 3.8, followed by red and orangered.
Last reviewed by Arielton Oberek.