#660310
a deep, electric red · warm · closest name: maroon
RGB
102, 3, 16
HSL
352°, 94%, 21%
CMYK
0, 97, 84, 60
Luminance
0.0293
Every format
| HEX | #660310 |
| RGB | rgb(102, 3, 16) |
| HSL | hsl(352, 94%, 21%) |
| CMYK | cmyk(0%, 97%, 84%, 60%) |
| LAB | lab(19.8 40.5 23.2) |
| LCH | lch(19.8 46.7 29.8) |
| OKLCH | oklch(0.324 0.128 23.4) |
Copy-ready code
/* CSS */
color: #660310;
background-color: #660310;
/* Tailwind (arbitrary) */
class="text-[#660310] bg-[#660310]"
/* SCSS */
$brand: #660310;
/* SwiftUI */
Color(red: 0.400, green: 0.012, blue: 0.063)
/* Android */
Color.parseColor("#660310")Accessibility — WCAG contrast
Aa
#660310 on white: 13.25:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#660310 on black: 1.59:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green1.2%
Blue6.3%
CMYK percentages
Cyan0.0%
Magenta97.1%
Yellow84.3%
Key (black)60.0%
Color previews
#660310 text on a black background
contrast 1.59:1
Card sample
#660310 text on a white background
contrast 13.25:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #660310;
Background color
Panel with #660310 background
background-color: #660310;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #660310;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 3, 16, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 3, 16, 0.45);
Border & gradient
Gradient panel
border: 3px solid #660310; background: linear-gradient(135deg, #660310, #663803);