#42ffdf
a balanced, electric cyan · cool · closest name: aquamarine
RGB
66, 255, 223
HSL
170°, 100%, 63%
CMYK
74, 0, 13, 0
Luminance
0.7801
Every format
| HEX | #42ffdf |
| RGB | rgb(66, 255, 223) |
| HSL | hsl(170, 100%, 63%) |
| CMYK | cmyk(74%, 0%, 13%, 0%) |
| LAB | lab(90.8 -53.1 2.0) |
| LCH | lch(90.8 53.1 177.8) |
| OKLCH | oklch(0.901 0.152 178.3) |
Copy-ready code
/* CSS */
color: #42ffdf;
background-color: #42ffdf;
/* Tailwind (arbitrary) */
class="text-[#42ffdf] bg-[#42ffdf]"
/* SCSS */
$brand: #42ffdf;
/* SwiftUI */
Color(red: 0.259, green: 1.000, blue: 0.875)
/* Android */
Color.parseColor("#42ffdf")Accessibility — WCAG contrast
Aa
#42ffdf on white: 1.26:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42ffdf on black: 16.60:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green100.0%
Blue87.5%
CMYK percentages
Cyan74.1%
Magenta0.0%
Yellow12.5%
Key (black)0.0%
Color previews
#42ffdf text on a black background
contrast 16.60:1
Card sample
#42ffdf text on a white background
contrast 1.26:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42ffdf;
Background color
Panel with #42ffdf background
background-color: #42ffdf;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42ffdf;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 255, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 255, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42ffdf; background: linear-gradient(135deg, #42ffdf, #42A1FF);