#b51e21
a dark, vivid red · warm · “firebrick”
RGB
181, 30, 33
HSL
359°, 72%, 41%
CMYK
0, 83, 82, 29
Luminance
0.1086
Every format
| HEX | #b51e21 |
| RGB | rgb(181, 30, 33) |
| HSL | hsl(359, 72%, 41%) |
| CMYK | cmyk(0%, 83%, 82%, 29%) |
| LAB | lab(39.4 57.8 38.6) |
| LCH | lch(39.4 69.5 33.8) |
| OKLCH | oklch(0.500 0.185 26.5) |
Copy-ready code
/* CSS */
color: #b51e21;
background-color: #b51e21;
/* Tailwind (arbitrary) */
class="text-[#b51e21] bg-[#b51e21]"
/* SCSS */
$brand: #b51e21;
/* SwiftUI */
Color(red: 0.710, green: 0.118, blue: 0.129)
/* Android */
Color.parseColor("#b51e21")Accessibility — WCAG contrast
Aa
#b51e21 on white: 6.62:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#b51e21 on black: 3.17:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red71.0%
Green11.8%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta83.4%
Yellow81.8%
Key (black)29.0%
Color previews
#b51e21 text on a black background
contrast 3.17:1
Card sample
#b51e21 text on a white background
contrast 6.62:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b51e21;
Background color
Panel with #b51e21 background
background-color: #b51e21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b51e21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(181, 30, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(181, 30, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b51e21; background: linear-gradient(135deg, #b51e21, #B5801E);