#660a0a
a deep, electric red · warm · closest name: maroon
RGB
102, 10, 10
HSL
0°, 82%, 22%
CMYK
0, 90, 90, 60
Luminance
0.0306
Every format
| HEX | #660a0a |
| RGB | rgb(102, 10, 10) |
| HSL | hsl(0, 82%, 22%) |
| CMYK | cmyk(0%, 90%, 90%, 60%) |
| LAB | lab(20.3 38.6 26.7) |
| LCH | lch(20.3 46.9 34.7) |
| OKLCH | oklch(0.328 0.124 27.6) |
Copy-ready code
/* CSS */
color: #660a0a;
background-color: #660a0a;
/* Tailwind (arbitrary) */
class="text-[#660a0a] bg-[#660a0a]"
/* SCSS */
$brand: #660a0a;
/* SwiftUI */
Color(red: 0.400, green: 0.039, blue: 0.039)
/* Android */
Color.parseColor("#660a0a")Accessibility — WCAG contrast
Aa
#660a0a on white: 13.02:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#660a0a on black: 1.61:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green3.9%
Blue3.9%
CMYK percentages
Cyan0.0%
Magenta90.2%
Yellow90.2%
Key (black)60.0%
Color previews
#660a0a text on a black background
contrast 1.61:1
Card sample
#660a0a text on a white background
contrast 13.02:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #660a0a;
Background color
Panel with #660a0a background
background-color: #660a0a;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #660a0a;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 10, 10, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 10, 10, 0.45);
Border & gradient
Gradient panel
border: 3px solid #660a0a; background: linear-gradient(135deg, #660a0a, #66470A);