#0451df
a dark, electric blue · cool · closest name: royalblue
RGB
4, 81, 223
HSL
219°, 97%, 45%
CMYK
98, 64, 0, 13
Luminance
0.1124
Every format
| HEX | #0451df |
| RGB | rgb(4, 81, 223) |
| HSL | hsl(219, 97%, 45%) |
| CMYK | cmyk(98%, 64%, 0%, 13%) |
| LAB | lab(40.0 36.6 -77.0) |
| LCH | lch(40.0 85.3 295.4) |
| OKLCH | oklch(0.496 0.226 262.0) |
Copy-ready code
/* CSS */
color: #0451df;
background-color: #0451df;
/* Tailwind (arbitrary) */
class="text-[#0451df] bg-[#0451df]"
/* SCSS */
$brand: #0451df;
/* SwiftUI */
Color(red: 0.016, green: 0.318, blue: 0.875)
/* Android */
Color.parseColor("#0451df")Accessibility — WCAG contrast
Aa
#0451df on white: 6.47:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#0451df on black: 3.25:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red1.6%
Green31.8%
Blue87.5%
CMYK percentages
Cyan98.2%
Magenta63.7%
Yellow0.0%
Key (black)12.5%
Color previews
#0451df text on a black background
contrast 3.25:1
Card sample
#0451df text on a white background
contrast 6.47:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #0451df;
Background color
Panel with #0451df background
background-color: #0451df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #0451df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(4, 81, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(4, 81, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #0451df; background: linear-gradient(135deg, #0451df, #4904DF);