#288fdf
a balanced, vivid blue · cool · closest name: steelblue
RGB
40, 143, 223
HSL
206°, 74%, 52%
CMYK
82, 36, 0, 13
Luminance
0.2542
Every format
| HEX | #288fdf |
| RGB | rgb(40, 143, 223) |
| HSL | hsl(206, 74%, 52%) |
| CMYK | cmyk(82%, 36%, 0%, 13%) |
| LAB | lab(57.5 -0.7 -48.7) |
| LCH | lch(57.5 48.7 269.2) |
| OKLCH | oklch(0.632 0.150 247.3) |
Copy-ready code
/* CSS */
color: #288fdf;
background-color: #288fdf;
/* Tailwind (arbitrary) */
class="text-[#288fdf] bg-[#288fdf]"
/* SCSS */
$brand: #288fdf;
/* SwiftUI */
Color(red: 0.157, green: 0.561, blue: 0.875)
/* Android */
Color.parseColor("#288fdf")Accessibility — WCAG contrast
Aa
#288fdf on white: 3.45:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#288fdf on black: 6.08:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red15.7%
Green56.1%
Blue87.5%
CMYK percentages
Cyan82.1%
Magenta35.9%
Yellow0.0%
Key (black)12.5%
Color previews
#288fdf text on a black background
contrast 6.08:1
Card sample
#288fdf text on a white background
contrast 3.45:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #288fdf;
Background color
Panel with #288fdf background
background-color: #288fdf;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #288fdf;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(40, 143, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 143, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #288fdf; background: linear-gradient(135deg, #288fdf, #3B28DF);