Color specimenNo. 10033947

#991B1B

Bright Dark Red

A deterministic reference card for #991B1B. Every value, scheme, and snippet below is computed from the hex — no database, no guesswork.

RGB
153, 27, 27
HSL
0°, 70%, 35%
Text
White on top

Tailwind CSS · red

tailwind · red 800

The Tailwind CSS utility classes bg-red-800, text-red-800, and friends all reference this hex value.

Scale context · red

Click any step to jump to its landing page.

Class name
red-800
Hex
#991B1B
Closest CSS named color
brown
Full color breakdown
/color/991b1b

Developer snippets

Copy-ready code

Every snippet below is generated from the hex — not a hand-maintained table.

Conversions

Same color, seven encodings

Nearest matches

Closest in other design systems

Accessibility

Contrast against white & black

On white

The quick brown fox

Jumps over the lazy dog. Testing readability of #991B1B as the text color.

8.31:1
AA passAAA passLarge pass

Rating · AAA

On black

The quick brown fox

Jumps over the lazy dog. Testing readability of #991B1B as the text color.

2.53:1
AA failAAA failLarge fail

Rating · Fail

Recommendation

When using #991B1B as a background, pair it with #ffffff text for the best WCAG contrast.

Contrast ratios only — one part of WCAG 2.1. Not a certification of accessibility or legal compliance.

Related Tailwind swatches

Other stops in red