#3957df
a balanced, vivid blue · warm · closest name: royalblue
RGB
57, 87, 223
HSL
229°, 72%, 55%
CMYK
74, 61, 0, 13
Luminance
0.1301
Every format
| HEX | #3957df |
| RGB | rgb(57, 87, 223) |
| HSL | hsl(229, 72%, 55%) |
| CMYK | cmyk(74%, 61%, 0%, 13%) |
| LAB | lab(42.8 35.9 -72.4) |
| LCH | lch(42.8 80.8 296.4) |
| OKLCH | oklch(0.521 0.209 268.4) |
Copy-ready code
/* CSS */
color: #3957df;
background-color: #3957df;
/* Tailwind (arbitrary) */
class="text-[#3957df] bg-[#3957df]"
/* SCSS */
$brand: #3957df;
/* SwiftUI */
Color(red: 0.224, green: 0.341, blue: 0.875)
/* Android */
Color.parseColor("#3957df")Accessibility — WCAG contrast
Aa
#3957df on white: 5.83:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3957df on black: 3.60:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red22.4%
Green34.1%
Blue87.5%
CMYK percentages
Cyan74.4%
Magenta61.0%
Yellow0.0%
Key (black)12.5%
Color previews
#3957df text on a black background
contrast 3.60:1
Card sample
#3957df text on a white background
contrast 5.83:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3957df;
Background color
Panel with #3957df background
background-color: #3957df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3957df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(57, 87, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(57, 87, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3957df; background: linear-gradient(135deg, #3957df, #8A39DF);