#3399dd
a balanced, vivid blue · cool · closest name: steelblue
RGB
51, 153, 221
HSL
204°, 71%, 53%
CMYK
77, 31, 0, 13
Luminance
0.2871
Every format
| HEX | #3399dd |
| RGB | rgb(51, 153, 221) |
| HSL | hsl(204, 71%, 53%) |
| CMYK | cmyk(77%, 31%, 0%, 13%) |
| LAB | lab(60.5 -6.1 -42.8) |
| LCH | lch(60.5 43.2 261.9) |
| OKLCH | oklch(0.656 0.137 242.7) |
Copy-ready code
/* CSS */
color: #3399dd;
background-color: #3399dd;
/* Tailwind (arbitrary) */
class="text-[#3399dd] bg-[#3399dd]"
/* SCSS */
$brand: #3399dd;
/* SwiftUI */
Color(red: 0.200, green: 0.600, blue: 0.867)
/* Android */
Color.parseColor("#3399dd")Accessibility — WCAG contrast
Aa
#3399dd on white: 3.12:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#3399dd on black: 6.74:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red20.0%
Green60.0%
Blue86.7%
CMYK percentages
Cyan76.9%
Magenta30.8%
Yellow0.0%
Key (black)13.3%
Color previews
#3399dd text on a black background
contrast 6.74:1
Card sample
#3399dd text on a white background
contrast 3.12:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3399dd;
Background color
Panel with #3399dd background
background-color: #3399dd;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3399dd;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(51, 153, 221, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(51, 153, 221, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3399dd; background: linear-gradient(135deg, #3399dd, #3E33DD);