#51dd21
a balanced, vivid green · cool · closest name: lime
RGB
81, 221, 33
HSL
105°, 74%, 50%
CMYK
63, 0, 85, 13
Luminance
0.5357
Every format
| HEX | #51dd21 |
| RGB | rgb(81, 221, 33) |
| HSL | hsl(105, 74%, 50%) |
| CMYK | cmyk(63%, 0%, 85%, 13%) |
| LAB | lab(78.2 -67.5 71.5) |
| LCH | lch(78.2 98.3 133.3) |
| OKLCH | oklch(0.790 0.243 139.8) |
Copy-ready code
/* CSS */
color: #51dd21;
background-color: #51dd21;
/* Tailwind (arbitrary) */
class="text-[#51dd21] bg-[#51dd21]"
/* SCSS */
$brand: #51dd21;
/* SwiftUI */
Color(red: 0.318, green: 0.867, blue: 0.129)
/* Android */
Color.parseColor("#51dd21")Accessibility — WCAG contrast
Aa
#51dd21 on white: 1.79:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#51dd21 on black: 11.71:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red31.8%
Green86.7%
Blue12.9%
CMYK percentages
Cyan63.3%
Magenta0.0%
Yellow85.1%
Key (black)13.3%
Color previews
#51dd21 text on a black background
contrast 11.71:1
Card sample
#51dd21 text on a white background
contrast 1.79:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #51dd21;
Background color
Panel with #51dd21 background
background-color: #51dd21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #51dd21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(81, 221, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(81, 221, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #51dd21; background: linear-gradient(135deg, #51dd21, #21DD6E);