#4239df
a balanced, vivid blue · warm · closest name: navy
RGB
66, 57, 223
HSL
243°, 72%, 55%
CMYK
70, 74, 0, 13
Luminance
0.0941
Every format
| HEX | #4239df |
| RGB | rgb(66, 57, 223) |
| HSL | hsl(243, 72%, 55%) |
| CMYK | cmyk(70%, 74%, 0%, 13%) |
| LAB | lab(36.8 54.4 -82.2) |
| LCH | lch(36.8 98.6 303.5) |
| OKLCH | oklch(0.478 0.239 274.9) |
Copy-ready code
/* CSS */
color: #4239df;
background-color: #4239df;
/* Tailwind (arbitrary) */
class="text-[#4239df] bg-[#4239df]"
/* SCSS */
$brand: #4239df;
/* SwiftUI */
Color(red: 0.259, green: 0.224, blue: 0.875)
/* Android */
Color.parseColor("#4239df")Accessibility — WCAG contrast
Aa
#4239df on white: 7.29:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#4239df on black: 2.88:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green22.4%
Blue87.5%
CMYK percentages
Cyan70.4%
Magenta74.4%
Yellow0.0%
Key (black)12.5%
Color previews
#4239df text on a black background
contrast 2.88:1
Card sample
#4239df text on a white background
contrast 7.29:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #4239df;
Background color
Panel with #4239df background
background-color: #4239df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #4239df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 57, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 57, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4239df; background: linear-gradient(135deg, #4239df, #B139DF);