#b50021
a dark, electric red · warm · closest name: firebrick
RGB
181, 0, 33
HSL
349°, 100%, 36%
CMYK
0, 100, 82, 29
Luminance
0.0993
Every format
| HEX | #b50021 |
| RGB | rgb(181, 0, 33) |
| HSL | hsl(349, 100%, 36%) |
| CMYK | cmyk(0%, 100%, 82%, 29%) |
| LAB | lab(37.7 62.5 37.0) |
| LCH | lch(37.7 72.6 30.7) |
| OKLCH | oklch(0.488 0.197 23.6) |
Copy-ready code
/* CSS */
color: #b50021;
background-color: #b50021;
/* Tailwind (arbitrary) */
class="text-[#b50021] bg-[#b50021]"
/* SCSS */
$brand: #b50021;
/* SwiftUI */
Color(red: 0.710, green: 0.000, blue: 0.129)
/* Android */
Color.parseColor("#b50021")Accessibility — WCAG contrast
Aa
#b50021 on white: 7.03:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#b50021 on black: 2.99:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red71.0%
Green0.0%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta100.0%
Yellow81.8%
Key (black)29.0%
Color previews
#b50021 text on a black background
contrast 2.99:1
Card sample
#b50021 text on a white background
contrast 7.03:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b50021;
Background color
Panel with #b50021 background
background-color: #b50021;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b50021;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(181, 0, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(181, 0, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b50021; background: linear-gradient(135deg, #b50021, #B55800);