#664b00
a deep, electric yellow · warm · closest name: sienna
RGB
102, 75, 0
HSL
44°, 100%, 20%
CMYK
0, 27, 100, 60
Luminance
0.0786
Every format
| HEX | #664b00 |
| RGB | rgb(102, 75, 0) |
| HSL | hsl(44, 100%, 20%) |
| CMYK | cmyk(0%, 27%, 100%, 60%) |
| LAB | lab(33.7 4.9 42.5) |
| LCH | lch(33.7 42.8 83.4) |
| OKLCH | oklch(0.430 0.088 84.8) |
Copy-ready code
/* CSS */
color: #664b00;
background-color: #664b00;
/* Tailwind (arbitrary) */
class="text-[#664b00] bg-[#664b00]"
/* SCSS */
$brand: #664b00;
/* SwiftUI */
Color(red: 0.400, green: 0.294, blue: 0.000)
/* Android */
Color.parseColor("#664b00")Accessibility — WCAG contrast
Aa
#664b00 on white: 8.17:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#664b00 on black: 2.57:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green29.4%
Blue0.0%
CMYK percentages
Cyan0.0%
Magenta26.5%
Yellow100.0%
Key (black)60.0%
Color previews
#664b00 text on a black background
contrast 2.57:1
Card sample
#664b00 text on a white background
contrast 8.17:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #664b00;
Background color
Panel with #664b00 background
background-color: #664b00;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #664b00;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 75, 0, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 75, 0, 0.45);
Border & gradient
Gradient panel
border: 3px solid #664b00; background: linear-gradient(135deg, #664b00, #3D6600);