#66df39
a balanced, vivid green · cool · closest name: lime
RGB
102, 223, 57
HSL
104°, 72%, 55%
CMYK
54, 0, 74, 13
Luminance
0.5590
Every format
| HEX | #66df39 |
| RGB | rgb(102, 223, 57) |
| HSL | hsl(104, 72%, 55%) |
| CMYK | cmyk(54%, 0%, 74%, 13%) |
| LAB | lab(79.5 -61.9 66.4) |
| LCH | lch(79.5 90.8 133.0) |
| OKLCH | oklch(0.803 0.227 138.9) |
Copy-ready code
/* CSS */
color: #66df39;
background-color: #66df39;
/* Tailwind (arbitrary) */
class="text-[#66df39] bg-[#66df39]"
/* SCSS */
$brand: #66df39;
/* SwiftUI */
Color(red: 0.400, green: 0.875, blue: 0.224)
/* Android */
Color.parseColor("#66df39")Accessibility — WCAG contrast
Aa
#66df39 on white: 1.72:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#66df39 on black: 12.18:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green87.5%
Blue22.4%
CMYK percentages
Cyan54.3%
Magenta0.0%
Yellow74.4%
Key (black)12.5%
Color previews
#66df39 text on a black background
contrast 12.18:1
Card sample
#66df39 text on a white background
contrast 1.72:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #66df39;
Background color
Panel with #66df39 background
background-color: #66df39;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #66df39;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 223, 57, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 223, 57, 0.45);
Border & gradient
Gradient panel
border: 3px solid #66df39; background: linear-gradient(135deg, #66df39, #39DF7B);