#288fe9
a balanced, electric blue · cool · closest name: dodgerblue
RGB
40, 143, 233
HSL
208°, 81%, 54%
CMYK
83, 39, 0, 9
Luminance
0.2598
Every format
| HEX | #288fe9 |
| RGB | rgb(40, 143, 233) |
| HSL | hsl(208, 81%, 54%) |
| CMYK | cmyk(83%, 39%, 0%, 9%) |
| LAB | lab(58.0 3.0 -53.4) |
| LCH | lch(58.0 53.5 273.2) |
| OKLCH | oklch(0.638 0.163 250.0) |
Copy-ready code
/* CSS */
color: #288fe9;
background-color: #288fe9;
/* Tailwind (arbitrary) */
class="text-[#288fe9] bg-[#288fe9]"
/* SCSS */
$brand: #288fe9;
/* SwiftUI */
Color(red: 0.157, green: 0.561, blue: 0.914)
/* Android */
Color.parseColor("#288fe9")Accessibility — WCAG contrast
Aa
#288fe9 on white: 3.39:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#288fe9 on black: 6.20:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red15.7%
Green56.1%
Blue91.4%
CMYK percentages
Cyan82.8%
Magenta38.6%
Yellow0.0%
Key (black)8.6%
Color previews
#288fe9 text on a black background
contrast 6.20:1
Card sample
#288fe9 text on a white background
contrast 3.39:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #288fe9;
Background color
Panel with #288fe9 background
background-color: #288fe9;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #288fe9;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(40, 143, 233, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 143, 233, 0.45);
Border & gradient
Gradient panel
border: 3px solid #288fe9; background: linear-gradient(135deg, #288fe9, #4228E9);