#a31600
a dark, electric red · warm · closest name: firebrick
RGB
163, 22, 0
HSL
8°, 100%, 32%
CMYK
0, 87, 100, 36
Luminance
0.0836
Every format
| HEX | #a31600 |
| RGB | rgb(163, 22, 0) |
| HSL | hsl(8, 100%, 32%) |
| CMYK | cmyk(0%, 87%, 100%, 36%) |
| LAB | lab(34.7 53.9 48.4) |
| LCH | lch(34.7 72.4 41.9) |
| OKLCH | oklch(0.458 0.176 31.5) |
Copy-ready code
/* CSS */
color: #a31600;
background-color: #a31600;
/* Tailwind (arbitrary) */
class="text-[#a31600] bg-[#a31600]"
/* SCSS */
$brand: #a31600;
/* SwiftUI */
Color(red: 0.639, green: 0.086, blue: 0.000)
/* Android */
Color.parseColor("#a31600")Accessibility — WCAG contrast
Aa
#a31600 on white: 7.86:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#a31600 on black: 2.67:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red63.9%
Green8.6%
Blue0.0%
CMYK percentages
Cyan0.0%
Magenta86.5%
Yellow100.0%
Key (black)36.1%
Color previews
#a31600 text on a black background
contrast 2.67:1
Card sample
#a31600 text on a white background
contrast 7.86:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #a31600;
Background color
Panel with #a31600 background
background-color: #a31600;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #a31600;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(163, 22, 0, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(163, 22, 0, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a31600; background: linear-gradient(135deg, #a31600, #A38300);