#42acef
a balanced, electric blue · cool · closest name: steelblue
RGB
66, 172, 239
HSL
203°, 84%, 60%
CMYK
72, 28, 0, 6
Luminance
0.3690
Every format
| HEX | #42acef |
| RGB | rgb(66, 172, 239) |
| HSL | hsl(203, 84%, 60%) |
| CMYK | cmyk(72%, 28%, 0%, 6%) |
| LAB | lab(67.2 -8.7 -42.2) |
| LCH | lch(67.2 43.1 258.3) |
| OKLCH | oklch(0.713 0.137 240.6) |
Copy-ready code
/* CSS */
color: #42acef;
background-color: #42acef;
/* Tailwind (arbitrary) */
class="text-[#42acef] bg-[#42acef]"
/* SCSS */
$brand: #42acef;
/* SwiftUI */
Color(red: 0.259, green: 0.675, blue: 0.937)
/* Android */
Color.parseColor("#42acef")Accessibility — WCAG contrast
Aa
#42acef on white: 2.51:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42acef on black: 8.38:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green67.5%
Blue93.7%
CMYK percentages
Cyan72.4%
Magenta28.0%
Yellow0.0%
Key (black)6.3%
Color previews
#42acef text on a black background
contrast 8.38:1
Card sample
#42acef text on a white background
contrast 2.51:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42acef;
Background color
Panel with #42acef background
background-color: #42acef;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42acef;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 172, 239, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 172, 239, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42acef; background: linear-gradient(135deg, #42acef, #4B42EF);