#51ffe4
a light, electric cyan · cool · closest name: aquamarine
RGB
81, 255, 228
HSL
171°, 100%, 66%
CMYK
68, 0, 11, 0
Luminance
0.7887
Every format
| HEX | #51ffe4 |
| RGB | rgb(81, 255, 228) |
| HSL | hsl(171, 100%, 66%) |
| CMYK | cmyk(68%, 0%, 11%, 0%) |
| LAB | lab(91.2 -50.0 0.1) |
| LCH | lch(91.2 50.0 179.9) |
| OKLCH | oklch(0.906 0.145 180.3) |
Copy-ready code
/* CSS */
color: #51ffe4;
background-color: #51ffe4;
/* Tailwind (arbitrary) */
class="text-[#51ffe4] bg-[#51ffe4]"
/* SCSS */
$brand: #51ffe4;
/* SwiftUI */
Color(red: 0.318, green: 1.000, blue: 0.894)
/* Android */
Color.parseColor("#51ffe4")Accessibility — WCAG contrast
Aa
#51ffe4 on white: 1.25:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#51ffe4 on black: 16.77:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red31.8%
Green100.0%
Blue89.4%
CMYK percentages
Cyan68.2%
Magenta0.0%
Yellow10.6%
Key (black)0.0%
Color previews
#51ffe4 text on a black background
contrast 16.77:1
Card sample
#51ffe4 text on a white background
contrast 1.25:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #51ffe4;
Background color
Panel with #51ffe4 background
background-color: #51ffe4;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #51ffe4;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(81, 255, 228, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(81, 255, 228, 0.45);
Border & gradient
Gradient panel
border: 3px solid #51ffe4; background: linear-gradient(135deg, #51ffe4, #51A6FF);