#3f37cf
a balanced, vivid blue · warm · closest name: navy
RGB
63, 55, 207
HSL
243°, 61%, 51%
CMYK
70, 73, 0, 19
Luminance
0.0829
Every format
| HEX | #3f37cf |
| RGB | rgb(63, 55, 207) |
| HSL | hsl(243, 61%, 51%) |
| CMYK | cmyk(70%, 73%, 0%, 19%) |
| LAB | lab(34.6 50.2 -76.6) |
| LCH | lch(34.6 91.6 303.2) |
| OKLCH | oklch(0.458 0.223 275.4) |
Copy-ready code
/* CSS */
color: #3f37cf;
background-color: #3f37cf;
/* Tailwind (arbitrary) */
class="text-[#3f37cf] bg-[#3f37cf]"
/* SCSS */
$brand: #3f37cf;
/* SwiftUI */
Color(red: 0.247, green: 0.216, blue: 0.812)
/* Android */
Color.parseColor("#3f37cf")Accessibility — WCAG contrast
Aa
#3f37cf on white: 7.90:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#3f37cf on black: 2.66:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green21.6%
Blue81.2%
CMYK percentages
Cyan69.6%
Magenta73.4%
Yellow0.0%
Key (black)18.8%
Color previews
#3f37cf text on a black background
contrast 2.66:1
Card sample
#3f37cf text on a white background
contrast 7.90:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f37cf;
Background color
Panel with #3f37cf background
background-color: #3f37cf;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f37cf;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 55, 207, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 55, 207, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f37cf; background: linear-gradient(135deg, #3f37cf, #A437CF);