#378cd3
a balanced, vivid blue · cool · closest name: steelblue
RGB
55, 140, 211
HSL
207°, 64%, 52%
CMYK
74, 34, 0, 17
Luminance
0.2427
Every format
| HEX | #378cd3 |
| RGB | rgb(55, 140, 211) |
| HSL | hsl(207, 64%, 52%) |
| CMYK | cmyk(74%, 34%, 0%, 17%) |
| LAB | lab(56.4 -1.6 -43.7) |
| LCH | lch(56.4 43.8 267.9) |
| OKLCH | oklch(0.622 0.135 247.5) |
Copy-ready code
/* CSS */
color: #378cd3;
background-color: #378cd3;
/* Tailwind (arbitrary) */
class="text-[#378cd3] bg-[#378cd3]"
/* SCSS */
$brand: #378cd3;
/* SwiftUI */
Color(red: 0.216, green: 0.549, blue: 0.827)
/* Android */
Color.parseColor("#378cd3")Accessibility — WCAG contrast
Aa
#378cd3 on white: 3.59:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#378cd3 on black: 5.85:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red21.6%
Green54.9%
Blue82.7%
CMYK percentages
Cyan73.9%
Magenta33.6%
Yellow0.0%
Key (black)17.3%
Color previews
#378cd3 text on a black background
contrast 5.85:1
Card sample
#378cd3 text on a white background
contrast 3.59:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #378cd3;
Background color
Panel with #378cd3 background
background-color: #378cd3;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #378cd3;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(55, 140, 211, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(55, 140, 211, 0.45);
Border & gradient
Gradient panel
border: 3px solid #378cd3; background: linear-gradient(135deg, #378cd3, #4A37D3);