#378fd3
a balanced, vivid blue · cool · closest name: steelblue
RGB
55, 143, 211
HSL
206°, 64%, 52%
CMYK
74, 32, 0, 17
Luminance
0.2516
Every format
| HEX | #378fd3 |
| RGB | rgb(55, 143, 211) |
| HSL | hsl(206, 64%, 52%) |
| CMYK | cmyk(74%, 32%, 0%, 17%) |
| LAB | lab(57.2 -3.4 -42.4) |
| LCH | lch(57.2 42.5 265.4) |
| OKLCH | oklch(0.629 0.132 245.7) |
Copy-ready code
/* CSS */
color: #378fd3;
background-color: #378fd3;
/* Tailwind (arbitrary) */
class="text-[#378fd3] bg-[#378fd3]"
/* SCSS */
$brand: #378fd3;
/* SwiftUI */
Color(red: 0.216, green: 0.561, blue: 0.827)
/* Android */
Color.parseColor("#378fd3")Accessibility — WCAG contrast
Aa
#378fd3 on white: 3.48:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#378fd3 on black: 6.03:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red21.6%
Green56.1%
Blue82.7%
CMYK percentages
Cyan73.9%
Magenta32.2%
Yellow0.0%
Key (black)17.3%
Color previews
#378fd3 text on a black background
contrast 6.03:1
Card sample
#378fd3 text on a white background
contrast 3.48:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #378fd3;
Background color
Panel with #378fd3 background
background-color: #378fd3;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #378fd3;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(55, 143, 211, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(55, 143, 211, 0.45);
Border & gradient
Gradient panel
border: 3px solid #378fd3; background: linear-gradient(135deg, #378fd3, #4737D3);