#a31021
a dark, electric red · warm · closest name: firebrick
RGB
163, 16, 33
HSL
353°, 82%, 35%
CMYK
0, 90, 80, 36
Luminance
0.0827
Every format
| HEX | #a31021 |
| RGB | rgb(163, 16, 33) |
| HSL | hsl(353, 82%, 35%) |
| CMYK | cmyk(0%, 90%, 80%, 36%) |
| LAB | lab(34.5 55.7 32.5) |
| LCH | lch(34.5 64.5 30.3) |
| OKLCH | oklch(0.457 0.176 23.7) |
Copy-ready code
/* CSS */
color: #a31021;
background-color: #a31021;
/* Tailwind (arbitrary) */
class="text-[#a31021] bg-[#a31021]"
/* SCSS */
$brand: #a31021;
/* SwiftUI */
Color(red: 0.639, green: 0.063, blue: 0.129)
/* Android */
Color.parseColor("#a31021")Accessibility — WCAG contrast
Aa
#a31021 on white: 7.91:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#a31021 on black: 2.65:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red63.9%
Green6.3%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta90.2%
Yellow79.8%
Key (black)36.1%
Color previews
#a31021 text on a black background
contrast 2.65:1
Card sample
#a31021 text on a white background
contrast 7.91:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #a31021;
Background color
Panel with #a31021 background
background-color: #a31021;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #a31021;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(163, 16, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(163, 16, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a31021; background: linear-gradient(135deg, #a31021, #A36110);