#3f51df
a balanced, vivid blue · warm · closest name: slateblue
RGB
63, 81, 223
HSL
233°, 71%, 56%
CMYK
72, 64, 0, 13
Luminance
0.1227
Every format
| HEX | #3f51df |
| RGB | rgb(63, 81, 223) |
| HSL | hsl(233, 71%, 56%) |
| CMYK | cmyk(72%, 64%, 0%, 13%) |
| LAB | lab(41.6 40.3 -74.2) |
| LCH | lch(41.6 84.5 298.5) |
| OKLCH | oklch(0.513 0.214 271.0) |
Copy-ready code
/* CSS */
color: #3f51df;
background-color: #3f51df;
/* Tailwind (arbitrary) */
class="text-[#3f51df] bg-[#3f51df]"
/* SCSS */
$brand: #3f51df;
/* SwiftUI */
Color(red: 0.247, green: 0.318, blue: 0.875)
/* Android */
Color.parseColor("#3f51df")Accessibility — WCAG contrast
Aa
#3f51df on white: 6.08:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3f51df on black: 3.45:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green31.8%
Blue87.5%
CMYK percentages
Cyan71.7%
Magenta63.7%
Yellow0.0%
Key (black)12.5%
Color previews
#3f51df text on a black background
contrast 3.45:1
Card sample
#3f51df text on a white background
contrast 6.08:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f51df;
Background color
Panel with #3f51df background
background-color: #3f51df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f51df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 81, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 81, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f51df; background: linear-gradient(135deg, #3f51df, #983FDF);