#42fdf4
a balanced, electric cyan · cool · closest name: cyan
RGB
66, 253, 244
HSL
177°, 98%, 63%
CMYK
74, 0, 4, 1
Luminance
0.7794
Every format
| HEX | #42fdf4 |
| RGB | rgb(66, 253, 244) |
| HSL | hsl(177, 98%, 63%) |
| CMYK | cmyk(74%, 0%, 4%, 1%) |
| LAB | lab(90.8 -46.8 -8.9) |
| LCH | lch(90.8 47.6 190.8) |
| OKLCH | oklch(0.903 0.144 190.0) |
Copy-ready code
/* CSS */
color: #42fdf4;
background-color: #42fdf4;
/* Tailwind (arbitrary) */
class="text-[#42fdf4] bg-[#42fdf4]"
/* SCSS */
$brand: #42fdf4;
/* SwiftUI */
Color(red: 0.259, green: 0.992, blue: 0.957)
/* Android */
Color.parseColor("#42fdf4")Accessibility — WCAG contrast
Aa
#42fdf4 on white: 1.27:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42fdf4 on black: 16.59:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green99.2%
Blue95.7%
CMYK percentages
Cyan73.9%
Magenta0.0%
Yellow3.6%
Key (black)0.8%
Color previews
#42fdf4 text on a black background
contrast 16.59:1
Card sample
#42fdf4 text on a white background
contrast 1.27:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42fdf4;
Background color
Panel with #42fdf4 background
background-color: #42fdf4;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42fdf4;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 253, 244, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 253, 244, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42fdf4; background: linear-gradient(135deg, #42fdf4, #4289FD);