#b31313
a dark, electric red · warm · closest name: firebrick
RGB
179, 19, 19
HSL
0°, 81%, 39%
CMYK
0, 89, 89, 30
Luminance
0.1010
Every format
| HEX | #b31313 |
| RGB | rgb(179, 19, 19) |
| HSL | hsl(0, 81%, 39%) |
| CMYK | cmyk(0%, 89%, 89%, 30%) |
| LAB | lab(38.0 59.2 44.5) |
| LCH | lch(38.0 74.1 36.9) |
| OKLCH | oklch(0.489 0.190 28.1) |
Copy-ready code
/* CSS */
color: #b31313;
background-color: #b31313;
/* Tailwind (arbitrary) */
class="text-[#b31313] bg-[#b31313]"
/* SCSS */
$brand: #b31313;
/* SwiftUI */
Color(red: 0.702, green: 0.075, blue: 0.075)
/* Android */
Color.parseColor("#b31313")Accessibility — WCAG contrast
Aa
#b31313 on white: 6.96:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#b31313 on black: 3.02:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red70.2%
Green7.5%
Blue7.5%
CMYK percentages
Cyan0.0%
Magenta89.4%
Yellow89.4%
Key (black)29.8%
Color previews
#b31313 text on a black background
contrast 3.02:1
Card sample
#b31313 text on a white background
contrast 6.96:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #b31313;
Background color
Panel with #b31313 background
background-color: #b31313;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #b31313;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(179, 19, 19, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(179, 19, 19, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b31313; background: linear-gradient(135deg, #b31313, #B37E13);