#0057ab
a dark, electric blue · cool · closest name: royalblue
RGB
0, 87, 171
HSL
210°, 100%, 34%
CMYK
100, 49, 0, 33
Luminance
0.0976
Every format
| HEX | #0057ab |
| RGB | rgb(0, 87, 171) |
| HSL | hsl(210, 100%, 34%) |
| CMYK | cmyk(100%, 49%, 0%, 33%) |
| LAB | lab(37.4 11.7 -51.0) |
| LCH | lch(37.4 52.3 282.9) |
| OKLCH | oklch(0.464 0.152 254.9) |
Copy-ready code
/* CSS */
color: #0057ab;
background-color: #0057ab;
/* Tailwind (arbitrary) */
class="text-[#0057ab] bg-[#0057ab]"
/* SCSS */
$brand: #0057ab;
/* SwiftUI */
Color(red: 0.000, green: 0.341, blue: 0.671)
/* Android */
Color.parseColor("#0057ab")Accessibility — WCAG contrast
Aa
#0057ab on white: 7.12:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#0057ab on black: 2.95:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red0.0%
Green34.1%
Blue67.1%
CMYK percentages
Cyan100.0%
Magenta49.1%
Yellow0.0%
Key (black)32.9%
Color previews
#0057ab text on a black background
contrast 2.95:1
Card sample
#0057ab text on a white background
contrast 7.12:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #0057ab;
Background color
Panel with #0057ab background
background-color: #0057ab;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #0057ab;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(0, 87, 171, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(0, 87, 171, 0.45);
Border & gradient
Gradient panel
border: 3px solid #0057ab; background: linear-gradient(135deg, #0057ab, #1B00AB);