#003557
a deep, electric blue · cool · closest name: darkslategray
RGB
0, 53, 87
HSL
203°, 100%, 17%
CMYK
100, 39, 0, 66
Luminance
0.0323
Every format
| HEX | #003557 |
| RGB | rgb(0, 53, 87) |
| HSL | hsl(203, 100%, 17%) |
| CMYK | cmyk(100%, 39%, 0%, 66%) |
| LAB | lab(21.0 -1.4 -24.9) |
| LCH | lch(21.0 25.0 266.8) |
| OKLCH | oklch(0.317 0.079 244.4) |
Copy-ready code
/* CSS */
color: #003557;
background-color: #003557;
/* Tailwind (arbitrary) */
class="text-[#003557] bg-[#003557]"
/* SCSS */
$brand: #003557;
/* SwiftUI */
Color(red: 0.000, green: 0.208, blue: 0.341)
/* Android */
Color.parseColor("#003557")Accessibility — WCAG contrast
Aa
#003557 on white: 12.75:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#003557 on black: 1.65:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red0.0%
Green20.8%
Blue34.1%
CMYK percentages
Cyan100.0%
Magenta39.1%
Yellow0.0%
Key (black)65.9%
Color previews
#003557 text on a black background
contrast 1.65:1
Card sample
#003557 text on a white background
contrast 12.75:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #003557;
Background color
Panel with #003557 background
background-color: #003557;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #003557;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(0, 53, 87, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(0, 53, 87, 0.45);
Border & gradient
Gradient panel
border: 3px solid #003557; background: linear-gradient(135deg, #003557, #050057);