#40b9df
a balanced, vivid cyan · cool · closest name: skyblue
RGB
64, 185, 223
HSL
194°, 71%, 56%
CMYK
71, 17, 0, 13
Luminance
0.4112
Every format
| HEX | #40b9df |
| RGB | rgb(64, 185, 223) |
| HSL | hsl(194, 71%, 56%) |
| CMYK | cmyk(71%, 17%, 0%, 13%) |
| LAB | lab(70.3 -21.2 -28.7) |
| LCH | lch(70.3 35.7 233.6) |
| OKLCH | oklch(0.735 0.118 223.0) |
Copy-ready code
/* CSS */
color: #40b9df;
background-color: #40b9df;
/* Tailwind (arbitrary) */
class="text-[#40b9df] bg-[#40b9df]"
/* SCSS */
$brand: #40b9df;
/* SwiftUI */
Color(red: 0.251, green: 0.725, blue: 0.875)
/* Android */
Color.parseColor("#40b9df")Accessibility — WCAG contrast
Aa
#40b9df on white: 2.28:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#40b9df on black: 9.22:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.1%
Green72.5%
Blue87.5%
CMYK percentages
Cyan71.3%
Magenta17.0%
Yellow0.0%
Key (black)12.5%
Color previews
#40b9df text on a black background
contrast 9.22:1
Card sample
#40b9df text on a white background
contrast 2.28:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #40b9df;
Background color
Panel with #40b9df background
background-color: #40b9df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #40b9df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(64, 185, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(64, 185, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #40b9df; background: linear-gradient(135deg, #40b9df, #404FDF);