#66c521
a balanced, vivid green · cool · closest name: forestgreen
RGB
102, 197, 33
HSL
95°, 71%, 45%
CMYK
48, 0, 83, 23
Luminance
0.4287
Every format
| HEX | #66c521 |
| RGB | rgb(102, 197, 33) |
| HSL | hsl(95, 71%, 45%) |
| CMYK | cmyk(48%, 0%, 83%, 23%) |
| LAB | lab(71.5 -53.6 65.8) |
| LCH | lch(71.5 84.9 129.2) |
| OKLCH | oklch(0.736 0.208 136.0) |
Copy-ready code
/* CSS */
color: #66c521;
background-color: #66c521;
/* Tailwind (arbitrary) */
class="text-[#66c521] bg-[#66c521]"
/* SCSS */
$brand: #66c521;
/* SwiftUI */
Color(red: 0.400, green: 0.773, blue: 0.129)
/* Android */
Color.parseColor("#66c521")Accessibility — WCAG contrast
Aa
#66c521 on white: 2.19:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#66c521 on black: 9.57:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green77.3%
Blue12.9%
CMYK percentages
Cyan48.2%
Magenta0.0%
Yellow83.2%
Key (black)22.7%
Color previews
#66c521 text on a black background
contrast 9.57:1
Card sample
#66c521 text on a white background
contrast 2.19:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #66c521;
Background color
Panel with #66c521 background
background-color: #66c521;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #66c521;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 197, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 197, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #66c521; background: linear-gradient(135deg, #66c521, #21C549);