#b31021
a dark, electric red · warm · closest name: firebrick
RGB
179, 16, 33
HSL
354°, 84%, 38%
CMYK
0, 91, 82, 30
Luminance
0.1006
Every format
| HEX | #b31021 |
| RGB | rgb(179, 16, 33) |
| HSL | hsl(354, 84%, 38%) |
| CMYK | cmyk(0%, 91%, 82%, 30%) |
| LAB | lab(38.0 60.0 37.1) |
| LCH | lch(38.0 70.6 31.7) |
| OKLCH | oklch(0.489 0.190 24.7) |
Copy-ready code
/* CSS */
color: #b31021;
background-color: #b31021;
/* Tailwind (arbitrary) */
class="text-[#b31021] bg-[#b31021]"
/* SCSS */
$brand: #b31021;
/* SwiftUI */
Color(red: 0.702, green: 0.063, blue: 0.129)
/* Android */
Color.parseColor("#b31021")Accessibility — WCAG contrast
Aa
#b31021 on white: 6.97:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#b31021 on black: 3.01:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red70.2%
Green6.3%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta91.1%
Yellow81.6%
Key (black)29.8%
Color previews
#b31021 text on a black background
contrast 3.01:1
Card sample
#b31021 text on a white background
contrast 6.97:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b31021;
Background color
Panel with #b31021 background
background-color: #b31021;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b31021;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(179, 16, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(179, 16, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b31021; background: linear-gradient(135deg, #b31021, #B36B10);