#3f37df
a balanced, vivid blue · warm · closest name: navy
RGB
63, 55, 223
HSL
243°, 72%, 55%
CMYK
72, 75, 0, 13
Luminance
0.0912
Every format
| HEX | #3f37df |
| RGB | rgb(63, 55, 223) |
| HSL | hsl(243, 72%, 55%) |
| CMYK | cmyk(72%, 75%, 0%, 13%) |
| LAB | lab(36.2 55.2 -83.2) |
| LCH | lch(36.2 99.8 303.6) |
| OKLCH | oklch(0.474 0.241 274.2) |
Copy-ready code
/* CSS */
color: #3f37df;
background-color: #3f37df;
/* Tailwind (arbitrary) */
class="text-[#3f37df] bg-[#3f37df]"
/* SCSS */
$brand: #3f37df;
/* SwiftUI */
Color(red: 0.247, green: 0.216, blue: 0.875)
/* Android */
Color.parseColor("#3f37df")Accessibility — WCAG contrast
Aa
#3f37df on white: 7.44:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#3f37df on black: 2.82:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red24.7%
Green21.6%
Blue87.5%
CMYK percentages
Cyan71.7%
Magenta75.3%
Yellow0.0%
Key (black)12.5%
Color previews
#3f37df text on a black background
contrast 2.82:1
Card sample
#3f37df text on a white background
contrast 7.44:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3f37df;
Background color
Panel with #3f37df background
background-color: #3f37df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3f37df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(63, 55, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(63, 55, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3f37df; background: linear-gradient(135deg, #3f37df, #AF37DF);