#3f41ba
a balanced, vivid blue · warm · closest name: slateblue
RGB
63, 65, 186
HSL
239°, 49%, 49%
CMYK
66, 65, 0, 27
Luminance
0.0838
Every format
| HEX | #3f41ba |
| RGB | rgb(63, 65, 186) |
| HSL | hsl(239, 49%, 49%) |
| CMYK | cmyk(66%, 65%, 0%, 27%) |
| LAB | lab(34.8 37.5 -64.0) |
| LCH | lch(34.8 74.2 300.3) |
| OKLCH | oklch(0.453 0.186 275.4) |
Copy-ready code
/* CSS */
color: #3f41ba;
background-color: #3f41ba;
/* Tailwind (arbitrary) */
class="text-[#3f41ba] bg-[#3f41ba]"
/* SCSS */
$brand: #3f41ba;
/* SwiftUI */
Color(red: 0.247, green: 0.255, blue: 0.729)
/* Android */
Color.parseColor("#3f41ba")Accessibility — WCAG contrast
Aa
#3f41ba on white: 7.85:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#3f41ba on black: 2.68:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green25.5%
Blue72.9%
CMYK percentages
Cyan66.1%
Magenta65.1%
Yellow0.0%
Key (black)27.1%
Color previews
#3f41ba text on a black background
contrast 2.68:1
Card sample
#3f41ba text on a white background
contrast 7.85:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f41ba;
Background color
Panel with #3f41ba background
background-color: #3f41ba;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f41ba;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 65, 186, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 65, 186, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f41ba; background: linear-gradient(135deg, #3f41ba, #8F3FBA);