#3366dd
a balanced, vivid blue · cool · “royalblue”
RGB
51, 102, 221
HSL
222°, 71%, 53%
CMYK
77, 54, 0, 13
Luminance
0.1543
Every format
| HEX | #3366dd |
| RGB | rgb(51, 102, 221) |
| HSL | hsl(222, 71%, 53%) |
| CMYK | cmyk(77%, 54%, 0%, 13%) |
| LAB | lab(46.2 25.0 -65.7) |
| LCH | lch(46.2 70.3 290.9) |
| OKLCH | oklch(0.545 0.190 263.7) |
Copy-ready code
/* CSS */
color: #3366dd;
background-color: #3366dd;
/* Tailwind (arbitrary) */
class="text-[#3366dd] bg-[#3366dd]"
/* SCSS */
$brand: #3366dd;
/* SwiftUI */
Color(red: 0.200, green: 0.400, blue: 0.867)
/* Android */
Color.parseColor("#3366dd")Accessibility — WCAG contrast
Aa
#3366dd on white: 5.14:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#3366dd on black: 4.09:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red20.0%
Green40.0%
Blue86.7%
CMYK percentages
Cyan76.9%
Magenta53.8%
Yellow0.0%
Key (black)13.3%
Color previews
#3366dd text on a black background
contrast 4.09:1
Card sample
#3366dd text on a white background
contrast 5.14:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3366dd;
Background color
Panel with #3366dd background
background-color: #3366dd;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3366dd;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(51, 102, 221, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(51, 102, 221, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3366dd; background: linear-gradient(135deg, #3366dd, #7133DD);