#40d0df
a balanced, vivid cyan · cool · closest name: skyblue
RGB
64, 208, 223
HSL
186°, 71%, 56%
CMYK
71, 7, 0, 13
Luminance
0.5153
Every format
| HEX | #40d0df |
| RGB | rgb(64, 208, 223) |
| HSL | hsl(186, 71%, 56%) |
| CMYK | cmyk(71%, 7%, 0%, 13%) |
| LAB | lab(77.0 -32.5 -18.4) |
| LCH | lch(77.0 37.4 209.5) |
| OKLCH | oklch(0.789 0.120 205.3) |
Copy-ready code
/* CSS */
color: #40d0df;
background-color: #40d0df;
/* Tailwind (arbitrary) */
class="text-[#40d0df] bg-[#40d0df]"
/* SCSS */
$brand: #40d0df;
/* SwiftUI */
Color(red: 0.251, green: 0.816, blue: 0.875)
/* Android */
Color.parseColor("#40d0df")Accessibility — WCAG contrast
Aa
#40d0df on white: 1.86:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#40d0df on black: 11.31:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.1%
Green81.6%
Blue87.5%
CMYK percentages
Cyan71.3%
Magenta6.7%
Yellow0.0%
Key (black)12.5%
Color previews
#40d0df text on a black background
contrast 11.31:1
Card sample
#40d0df text on a white background
contrast 1.86:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #40d0df;
Background color
Panel with #40d0df background
background-color: #40d0df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #40d0df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(64, 208, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(64, 208, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #40d0df; background: linear-gradient(135deg, #40d0df, #4066DF);