#3966db
a balanced, vivid blue · cool · “royalblue”
RGB
57, 102, 219
HSL
223°, 69%, 54%
CMYK
74, 53, 0, 14
Luminance
0.1549
Every format
| HEX | #3966db |
| RGB | rgb(57, 102, 219) |
| HSL | hsl(223, 69%, 54%) |
| CMYK | cmyk(74%, 53%, 0%, 14%) |
| LAB | lab(46.3 25.0 -64.4) |
| LCH | lch(46.3 69.0 291.2) |
| OKLCH | oklch(0.546 0.186 264.9) |
Copy-ready code
/* CSS */
color: #3966db;
background-color: #3966db;
/* Tailwind (arbitrary) */
class="text-[#3966db] bg-[#3966db]"
/* SCSS */
$brand: #3966db;
/* SwiftUI */
Color(red: 0.224, green: 0.400, blue: 0.859)
/* Android */
Color.parseColor("#3966db")Accessibility — WCAG contrast
Aa
#3966db on white: 5.13:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3966db on black: 4.10:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red22.4%
Green40.0%
Blue85.9%
CMYK percentages
Cyan74.0%
Magenta53.4%
Yellow0.0%
Key (black)14.1%
Color previews
#3966db text on a black background
contrast 4.10:1
Card sample
#3966db text on a white background
contrast 5.13:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3966db;
Background color
Panel with #3966db background
background-color: #3966db;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3966db;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(57, 102, 219, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(57, 102, 219, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3966db; background: linear-gradient(135deg, #3966db, #7839DB);