#42ade4
a balanced, electric blue · cool · closest name: steelblue
RGB
66, 173, 228
HSL
200°, 75%, 58%
CMYK
71, 24, 0, 11
Luminance
0.3665
Every format
| HEX | #42ade4 |
| RGB | rgb(66, 173, 228) |
| HSL | hsl(200, 75%, 58%) |
| CMYK | cmyk(71%, 24%, 0%, 11%) |
| LAB | lab(67.0 -12.9 -36.5) |
| LCH | lch(67.0 38.7 250.5) |
| OKLCH | oklch(0.710 0.125 235.1) |
Copy-ready code
/* CSS */
color: #42ade4;
background-color: #42ade4;
/* Tailwind (arbitrary) */
class="text-[#42ade4] bg-[#42ade4]"
/* SCSS */
$brand: #42ade4;
/* SwiftUI */
Color(red: 0.259, green: 0.678, blue: 0.894)
/* Android */
Color.parseColor("#42ade4")Accessibility — WCAG contrast
Aa
#42ade4 on white: 2.52:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42ade4 on black: 8.33:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green67.8%
Blue89.4%
CMYK percentages
Cyan71.1%
Magenta24.1%
Yellow0.0%
Key (black)10.6%
Color previews
#42ade4 text on a black background
contrast 8.33:1
Card sample
#42ade4 text on a white background
contrast 2.52:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42ade4;
Background color
Panel with #42ade4 background
background-color: #42ade4;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42ade4;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 173, 228, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 173, 228, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42ade4; background: linear-gradient(135deg, #42ade4, #4342E4);