#370cd3
a dark, electric blue · warm · closest name: blue
RGB
55, 12, 211
HSL
253°, 89%, 44%
CMYK
74, 94, 0, 17
Luminance
0.0578
Every format
| HEX | #370cd3 |
| RGB | rgb(55, 12, 211) |
| HSL | hsl(253, 89%, 44%) |
| CMYK | cmyk(74%, 94%, 0%, 17%) |
| LAB | lab(28.8 67.3 -88.5) |
| LCH | lch(28.8 111.2 307.3) |
| OKLCH | oklch(0.418 0.256 274.9) |
Copy-ready code
/* CSS */
color: #370cd3;
background-color: #370cd3;
/* Tailwind (arbitrary) */
class="text-[#370cd3] bg-[#370cd3]"
/* SCSS */
$brand: #370cd3;
/* SwiftUI */
Color(red: 0.216, green: 0.047, blue: 0.827)
/* Android */
Color.parseColor("#370cd3")Accessibility — WCAG contrast
Aa
#370cd3 on white: 9.74:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#370cd3 on black: 2.16:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red21.6%
Green4.7%
Blue82.7%
CMYK percentages
Cyan73.9%
Magenta94.3%
Yellow0.0%
Key (black)17.3%
Color previews
#370cd3 text on a black background
contrast 2.16:1
Card sample
#370cd3 text on a white background
contrast 9.74:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #370cd3;
Background color
Panel with #370cd3 background
background-color: #370cd3;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #370cd3;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(55, 12, 211, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(55, 12, 211, 0.45);
Border & gradient
Gradient panel
border: 3px solid #370cd3; background: linear-gradient(135deg, #370cd3, #BC0CD3);