#3966df
a balanced, vivid blue · cool · “royalblue”
RGB
57, 102, 223
HSL
224°, 72%, 55%
CMYK
74, 54, 0, 13
Luminance
0.1570
Every format
| HEX | #3966df |
| RGB | rgb(57, 102, 223) |
| HSL | hsl(224, 72%, 55%) |
| CMYK | cmyk(74%, 54%, 0%, 13%) |
| LAB | lab(46.6 26.4 -66.2) |
| LCH | lch(46.6 71.3 291.8) |
| OKLCH | oklch(0.549 0.191 265.2) |
Copy-ready code
/* CSS */
color: #3966df;
background-color: #3966df;
/* Tailwind (arbitrary) */
class="text-[#3966df] bg-[#3966df]"
/* SCSS */
$brand: #3966df;
/* SwiftUI */
Color(red: 0.224, green: 0.400, blue: 0.875)
/* Android */
Color.parseColor("#3966df")Accessibility — WCAG contrast
Aa
#3966df on white: 5.07:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3966df on black: 4.14:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red22.4%
Green40.0%
Blue87.5%
CMYK percentages
Cyan74.4%
Magenta54.3%
Yellow0.0%
Key (black)12.5%
Color previews
#3966df text on a black background
contrast 4.14:1
Card sample
#3966df text on a white background
contrast 5.07:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3966df;
Background color
Panel with #3966df background
background-color: #3966df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3966df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(57, 102, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(57, 102, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3966df; background: linear-gradient(135deg, #3966df, #7B39DF);