#ff0a0a
a balanced, electric red · warm · “red”
RGB
255, 10, 10
HSL
0°, 100%, 52%
CMYK
0, 96, 96, 0
Luminance
0.2150
Every format
| HEX | #ff0a0a |
| RGB | rgb(255, 10, 10) |
| HSL | hsl(0, 100%, 52%) |
| CMYK | cmyk(0%, 96%, 96%, 0%) |
| LAB | lab(53.5 79.5 64.9) |
| LCH | lch(53.5 102.6 39.2) |
| OKLCH | oklch(0.630 0.256 29.0) |
Copy-ready code
/* CSS */
color: #ff0a0a;
background-color: #ff0a0a;
/* Tailwind (arbitrary) */
class="text-[#ff0a0a] bg-[#ff0a0a]"
/* SCSS */
$brand: #ff0a0a;
/* SwiftUI */
Color(red: 1.000, green: 0.039, blue: 0.039)
/* Android */
Color.parseColor("#ff0a0a")Accessibility — WCAG contrast
Aa
#ff0a0a on white: 3.96:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#ff0a0a on black: 5.30:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red100.0%
Green3.9%
Blue3.9%
CMYK percentages
Cyan0.0%
Magenta96.1%
Yellow96.1%
Key (black)0.0%
Color previews
#ff0a0a text on a black background
contrast 5.30:1
Card sample
#ff0a0a text on a white background
contrast 3.96:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #ff0a0a;
Background color
Panel with #ff0a0a background
background-color: #ff0a0a;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #ff0a0a;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(255, 10, 10, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(255, 10, 10, 0.45);
Border & gradient
Gradient panel
border: 3px solid #ff0a0a; background: linear-gradient(135deg, #ff0a0a, #FFAD0A);