#66ffff
a light, electric cyan · cool · closest name: cyan
RGB
102, 255, 255
HSL
180°, 100%, 70%
CMYK
60, 0, 0, 0
Luminance
0.8156
Every format
| HEX | #66ffff |
| RGB | rgb(102, 255, 255) |
| HSL | hsl(180, 100%, 70%) |
| CMYK | cmyk(60%, 0%, 0%, 0%) |
| LAB | lab(92.4 -40.0 -12.1) |
| LCH | lch(92.4 41.8 196.9) |
| OKLCH | oklch(0.919 0.129 195.2) |
Copy-ready code
/* CSS */
color: #66ffff;
background-color: #66ffff;
/* Tailwind (arbitrary) */
class="text-[#66ffff] bg-[#66ffff]"
/* SCSS */
$brand: #66ffff;
/* SwiftUI */
Color(red: 0.400, green: 1.000, blue: 1.000)
/* Android */
Color.parseColor("#66ffff")Accessibility — WCAG contrast
Aa
#66ffff on white: 1.21:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#66ffff on black: 17.31:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green100.0%
Blue100.0%
CMYK percentages
Cyan60.0%
Magenta0.0%
Yellow0.0%
Key (black)0.0%
Color previews
#66ffff text on a black background
contrast 17.31:1
Card sample
#66ffff text on a white background
contrast 1.21:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #66ffff;
Background color
Panel with #66ffff background
background-color: #66ffff;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #66ffff;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 255, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 255, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #66ffff; background: linear-gradient(135deg, #66ffff, #6699FF);