#3399bb
a balanced, vivid cyan · cool · closest name: steelblue
RGB
51, 153, 187
HSL
195°, 57%, 47%
CMYK
73, 18, 0, 27
Luminance
0.2707
Every format
| HEX | #3399bb |
| RGB | rgb(51, 153, 187) |
| HSL | hsl(195, 57%, 47%) |
| CMYK | cmyk(73%, 18%, 0%, 27%) |
| LAB | lab(59.0 -17.8 -26.0) |
| LCH | lch(59.0 31.5 235.7) |
| OKLCH | oklch(0.640 0.104 224.5) |
Copy-ready code
/* CSS */
color: #3399bb;
background-color: #3399bb;
/* Tailwind (arbitrary) */
class="text-[#3399bb] bg-[#3399bb]"
/* SCSS */
$brand: #3399bb;
/* SwiftUI */
Color(red: 0.200, green: 0.600, blue: 0.733)
/* Android */
Color.parseColor("#3399bb")Accessibility — WCAG contrast
Aa
#3399bb on white: 3.27:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#3399bb on black: 6.41:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red20.0%
Green60.0%
Blue73.3%
CMYK percentages
Cyan72.7%
Magenta18.2%
Yellow0.0%
Key (black)26.7%
Color previews
#3399bb text on a black background
contrast 6.41:1
Card sample
#3399bb text on a white background
contrast 3.27:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3399bb;
Background color
Panel with #3399bb background
background-color: #3399bb;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3399bb;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(51, 153, 187, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(51, 153, 187, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3399bb; background: linear-gradient(135deg, #3399bb, #333EBB);