#42c5df
a balanced, vivid cyan · cool · closest name: skyblue
RGB
66, 197, 223
HSL
190°, 71%, 57%
CMYK
70, 12, 0, 13
Luminance
0.4642
Every format
| HEX | #42c5df |
| RGB | rgb(66, 197, 223) |
| HSL | hsl(190, 71%, 57%) |
| CMYK | cmyk(70%, 12%, 0%, 13%) |
| LAB | lab(73.8 -27.0 -23.3) |
| LCH | lch(73.8 35.6 220.8) |
| OKLCH | oklch(0.764 0.116 213.8) |
Copy-ready code
/* CSS */
color: #42c5df;
background-color: #42c5df;
/* Tailwind (arbitrary) */
class="text-[#42c5df] bg-[#42c5df]"
/* SCSS */
$brand: #42c5df;
/* SwiftUI */
Color(red: 0.259, green: 0.773, blue: 0.875)
/* Android */
Color.parseColor("#42c5df")Accessibility — WCAG contrast
Aa
#42c5df on white: 2.04:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42c5df on black: 10.28:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green77.3%
Blue87.5%
CMYK percentages
Cyan70.4%
Magenta11.7%
Yellow0.0%
Key (black)12.5%
Color previews
#42c5df text on a black background
contrast 10.28:1
Card sample
#42c5df text on a white background
contrast 2.04:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42c5df;
Background color
Panel with #42c5df background
background-color: #42c5df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42c5df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 197, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 197, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42c5df; background: linear-gradient(135deg, #42c5df, #425DDF);