#3f43df
a balanced, vivid blue · warm · closest name: slateblue
RGB
63, 67, 223
HSL
239°, 71%, 56%
CMYK
72, 70, 0, 13
Luminance
0.1040
Every format
| HEX | #3f43df |
| RGB | rgb(63, 67, 223) |
| HSL | hsl(239, 71%, 56%) |
| CMYK | cmyk(72%, 70%, 0%, 13%) |
| LAB | lab(38.5 48.6 -79.3) |
| LCH | lch(38.5 93.0 301.5) |
| OKLCH | oklch(0.491 0.230 272.9) |
Copy-ready code
/* CSS */
color: #3f43df;
background-color: #3f43df;
/* Tailwind (arbitrary) */
class="text-[#3f43df] bg-[#3f43df]"
/* SCSS */
$brand: #3f43df;
/* SwiftUI */
Color(red: 0.247, green: 0.263, blue: 0.875)
/* Android */
Color.parseColor("#3f43df")Accessibility — WCAG contrast
Aa
#3f43df on white: 6.82:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3f43df on black: 3.08:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green26.3%
Blue87.5%
CMYK percentages
Cyan71.7%
Magenta70.0%
Yellow0.0%
Key (black)12.5%
Color previews
#3f43df text on a black background
contrast 3.08:1
Card sample
#3f43df text on a white background
contrast 6.82:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f43df;
Background color
Panel with #3f43df background
background-color: #3f43df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f43df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 67, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 67, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f43df; background: linear-gradient(135deg, #3f43df, #A63FDF);