#3f40eb
a balanced, electric blue · warm · closest name: slateblue
RGB
63, 64, 235
HSL
240°, 81%, 58%
CMYK
73, 73, 0, 8
Luminance
0.1072
Every format
| HEX | #3f40eb |
| RGB | rgb(63, 64, 235) |
| HSL | hsl(240, 81%, 58%) |
| CMYK | cmyk(73%, 73%, 0%, 8%) |
| LAB | lab(39.1 54.2 -85.2) |
| LCH | lch(39.1 101.0 302.5) |
| OKLCH | oklch(0.498 0.247 272.7) |
Copy-ready code
/* CSS */
color: #3f40eb;
background-color: #3f40eb;
/* Tailwind (arbitrary) */
class="text-[#3f40eb] bg-[#3f40eb]"
/* SCSS */
$brand: #3f40eb;
/* SwiftUI */
Color(red: 0.247, green: 0.251, blue: 0.922)
/* Android */
Color.parseColor("#3f40eb")Accessibility — WCAG contrast
Aa
#3f40eb on white: 6.68:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3f40eb on black: 3.14:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green25.1%
Blue92.2%
CMYK percentages
Cyan73.2%
Magenta72.8%
Yellow0.0%
Key (black)7.8%
Color previews
#3f40eb text on a black background
contrast 3.14:1
Card sample
#3f40eb text on a white background
contrast 6.68:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f40eb;
Background color
Panel with #3f40eb background
background-color: #3f40eb;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f40eb;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 64, 235, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 64, 235, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f40eb; background: linear-gradient(135deg, #3f40eb, #B13FEB);