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bg-red-900

Tailwind Red 900

#7F1D1D·Red family·Shade 900

Color Values

HEX
#7F1D1D
RGB
rgb(127, 29, 29)
HSL
hsl(0, 63%, 31%)
OKLCH
oklch(0.396 0.133 26)
CMYK
cmyk(0%, 77%, 77%, 50%)
CSS Variable
var(--color-red-900)
Tailwind Class
bg-red-900

Accessibility Score

60/100

Good

Based on WCAG 2.1 contrast ratios against white and black backgrounds.

On White

10.02:1

AAA

On Black

2.1:1

Fail
Test in Contrast Checker →

Tailwind Usage — All Utilities

Background

bg-red-900

Text

text-red-900

Border

border-red-900

Ring

ring-red-900

Outline

outline-red-900

Fill

fill-red-900

Stroke

stroke-red-900

From (gradient)

from-red-900

Via (gradient)

via-red-900

To (gradient)

to-red-900

Placeholder

placeholder-red-900

Caret

caret-red-900

Accent

accent-red-900

Decoration

decoration-red-900

Shadow Color

shadow-red-900

Tailwind v3 Config (extend custom color)

// tailwind.config.js module.exports = { theme: { extend: { colors: { 'red-900': '#7f1d1d', }, }, }, };

CSS Equivalent

/* Hex */
background-color: #7F1D1D;

/* RGB */
background-color: rgb(127, 29, 29);

/* HSL */
background-color: hsl(0, 63%, 31%);

/* OKLCH (CSS Color Level 4) */
background-color: oklch(0.396 0.133 26);

/* CSS Custom Property (Tailwind v4) */
background-color: var(--color-red-900);

/* Gradient example */
background: linear-gradient(135deg, #fef2f2 0%, #450a0a 100%);

OKLCH — Modern Color Space

Lightness (L)

0.396

40% perceived brightness

Chroma (C)

0.133

Color intensity / saturation

Hue (H)

26°

Angle on perceptual hue wheel

oklch(0.396 0.133 26)

OKLCH is a perceptually uniform color space in CSS Color Level 4. Unlike HSL, equal steps in L produce equal perceived lightness changes — making it ideal for building accessible, harmonious design system scales.

Design Recommendations

Strong dark tone

Shade 900 of the Red palette

Recommended Uses

  • ✓Body text on white
  • ✓Dark panel backgrounds
  • ✓Near-dark UI elements
  • ✓Footer backgrounds
  • ✓High-contrast headings

Avoid

✗On dark backgrounds — contrast will be insufficient.

Preview

On White

Aa Bb Cc

On Black

Aa Bb Cc

As Background

Aa Bb Cc — #7F1D1D

Red Shades

50

100

200

300

400

500

600

700

800

900

950

Similar Tailwind Colors

Perceptually close shades from other Tailwind color families.

Tailwind Rose 900

#881337

Tailwind Orange 900

#7C2D12

Tailwind Pink 900

#831843

Tailwind Amber 900

#78350F

Tailwind Rose 800

#9F1239

Tailwind Orange 800

#9A3412

Nearest Named Color

Tailwind Red 900

Nearest Tailwind equivalent — #7F1D1D

Design & Accessibility Guides

Guide

Building an Accessible Color System

Design Systems · 10 min read

Guide

WCAG Contrast Ratios Explained

WCAG · 8 min read

Guide

WCAG AA vs AAA: Which Standard Should You Target?

WCAG · 7 min read

Frequently Asked Questions

What is the hex code for Tailwind Red 900?
Tailwind Red 900 has the hex code #7F1D1D. Its RGB value is rgb(127, 29, 29) and its HSL value is hsl(0, 63%, 31%).
What Tailwind utility classes use Red 900?
Use bg-red-900 for backgrounds, text-red-900 for text color, border-red-900 for borders, and ring-red-900 for focus rings. In Tailwind v4 the CSS variable var(--color-red-900) is available natively.
Is Tailwind Red 900 WCAG accessible?
Tailwind Red 900 achieves a 10.02:1 contrast ratio on white (AAA) and 2.1:1 on black (Fail). Its overall accessibility score is 60/100 (Good).
What is the OKLCH value for Tailwind Red 900?
Tailwind Red 900 in OKLCH is oklch(0.396 0.133 26) — lightness 0.396, chroma 0.133, hue 26°. OKLCH is a perceptually uniform space supported natively in modern CSS via the `color()` function.
What is Tailwind Red 900 used for?
At shade 900, Tailwind Red 900 is best described as "Strong dark tone". Recommended uses: Body text on white, Dark panel backgrounds, Near-dark UI elements.
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