#66ade9
a light, vivid blue · cool · closest name: steelblue
RGB
102, 173, 233
HSL
208°, 75%, 66%
CMYK
56, 26, 0, 9
Luminance
0.3860
Every format
| HEX | #66ade9 |
| RGB | rgb(102, 173, 233) |
| HSL | hsl(208, 75%, 66%) |
| CMYK | cmyk(56%, 26%, 0%, 9%) |
| LAB | lab(68.5 -5.2 -36.9) |
| LCH | lch(68.5 37.2 261.9) |
| OKLCH | oklch(0.725 0.113 245.7) |
Copy-ready code
/* CSS */
color: #66ade9;
background-color: #66ade9;
/* Tailwind (arbitrary) */
class="text-[#66ade9] bg-[#66ade9]"
/* SCSS */
$brand: #66ade9;
/* SwiftUI */
Color(red: 0.400, green: 0.678, blue: 0.914)
/* Android */
Color.parseColor("#66ade9")Accessibility — WCAG contrast
Aa
#66ade9 on white: 2.41:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#66ade9 on black: 8.72:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green67.8%
Blue91.4%
CMYK percentages
Cyan56.2%
Magenta25.8%
Yellow0.0%
Key (black)8.6%
Color previews
#66ade9 text on a black background
contrast 8.72:1
Card sample
#66ade9 text on a white background
contrast 2.41:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #66ade9;
Background color
Panel with #66ade9 background
background-color: #66ade9;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #66ade9;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 173, 233, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 173, 233, 0.45);
Border & gradient
Gradient panel
border: 3px solid #66ade9; background: linear-gradient(135deg, #66ade9, #7666E9);