#40c9df
a balanced, vivid cyan · cool · closest name: skyblue
RGB
64, 201, 223
HSL
188°, 71%, 56%
CMYK
71, 10, 0, 13
Luminance
0.4819
Every format
| HEX | #40c9df |
| RGB | rgb(64, 201, 223) |
| HSL | hsl(188, 71%, 56%) |
| CMYK | cmyk(71%, 10%, 0%, 13%) |
| LAB | lab(74.9 -29.2 -21.5) |
| LCH | lch(74.9 36.3 216.4) |
| OKLCH | oklch(0.773 0.118 210.5) |
Copy-ready code
/* CSS */
color: #40c9df;
background-color: #40c9df;
/* Tailwind (arbitrary) */
class="text-[#40c9df] bg-[#40c9df]"
/* SCSS */
$brand: #40c9df;
/* SwiftUI */
Color(red: 0.251, green: 0.788, blue: 0.875)
/* Android */
Color.parseColor("#40c9df")Accessibility — WCAG contrast
Aa
#40c9df on white: 1.97:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#40c9df on black: 10.64:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.1%
Green78.8%
Blue87.5%
CMYK percentages
Cyan71.3%
Magenta9.9%
Yellow0.0%
Key (black)12.5%
Color previews
#40c9df text on a black background
contrast 10.64:1
Card sample
#40c9df text on a white background
contrast 1.97:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #40c9df;
Background color
Panel with #40c9df background
background-color: #40c9df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #40c9df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(64, 201, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(64, 201, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #40c9df; background: linear-gradient(135deg, #40c9df, #405FDF);