#b51a21
a dark, vivid red · warm · closest name: firebrick
RGB
181, 26, 33
HSL
357°, 75%, 41%
CMYK
0, 86, 82, 29
Luminance
0.1067
Every format
| HEX | #b51a21 |
| RGB | rgb(181, 26, 33) |
| HSL | hsl(357, 75%, 41%) |
| CMYK | cmyk(0%, 86%, 82%, 29%) |
| LAB | lab(39.0 58.7 38.3) |
| LCH | lch(39.0 70.1 33.1) |
| OKLCH | oklch(0.497 0.188 25.9) |
Copy-ready code
/* CSS */
color: #b51a21;
background-color: #b51a21;
/* Tailwind (arbitrary) */
class="text-[#b51a21] bg-[#b51a21]"
/* SCSS */
$brand: #b51a21;
/* SwiftUI */
Color(red: 0.710, green: 0.102, blue: 0.129)
/* Android */
Color.parseColor("#b51a21")Accessibility — WCAG contrast
Aa
#b51a21 on white: 6.70:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#b51a21 on black: 3.13:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red71.0%
Green10.2%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta85.6%
Yellow81.8%
Key (black)29.0%
Color previews
#b51a21 text on a black background
contrast 3.13:1
Card sample
#b51a21 text on a white background
contrast 6.70:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b51a21;
Background color
Panel with #b51a21 background
background-color: #b51a21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b51a21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(181, 26, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(181, 26, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b51a21; background: linear-gradient(135deg, #b51a21, #B57A1A);