#b51b21
a dark, vivid red · warm · closest name: firebrick
RGB
181, 27, 33
HSL
358°, 74%, 41%
CMYK
0, 85, 82, 29
Luminance
0.1072
Every format
| HEX | #b51b21 |
| RGB | rgb(181, 27, 33) |
| HSL | hsl(358, 74%, 41%) |
| CMYK | cmyk(0%, 85%, 82%, 29%) |
| LAB | lab(39.1 58.5 38.4) |
| LCH | lch(39.1 70.0 33.3) |
| OKLCH | oklch(0.498 0.187 26.0) |
Copy-ready code
/* CSS */
color: #b51b21;
background-color: #b51b21;
/* Tailwind (arbitrary) */
class="text-[#b51b21] bg-[#b51b21]"
/* SCSS */
$brand: #b51b21;
/* SwiftUI */
Color(red: 0.710, green: 0.106, blue: 0.129)
/* Android */
Color.parseColor("#b51b21")Accessibility — WCAG contrast
Aa
#b51b21 on white: 6.68:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#b51b21 on black: 3.14:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red71.0%
Green10.6%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta85.1%
Yellow81.8%
Key (black)29.0%
Color previews
#b51b21 text on a black background
contrast 3.14:1
Card sample
#b51b21 text on a white background
contrast 6.68:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b51b21;
Background color
Panel with #b51b21 background
background-color: #b51b21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b51b21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(181, 27, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(181, 27, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b51b21; background: linear-gradient(135deg, #b51b21, #B57C1B);