#21ade9
a balanced, electric cyan · cool · closest name: steelblue
RGB
33, 173, 233
HSL
198°, 82%, 52%
CMYK
86, 26, 0, 9
Luminance
0.3609
Every format
| HEX | #21ade9 |
| RGB | rgb(33, 173, 233) |
| HSL | hsl(198, 82%, 52%) |
| CMYK | cmyk(86%, 26%, 0%, 9%) |
| LAB | lab(66.6 -14.5 -39.9) |
| LCH | lch(66.6 42.5 250.0) |
| OKLCH | oklch(0.705 0.140 233.7) |
Copy-ready code
/* CSS */
color: #21ade9;
background-color: #21ade9;
/* Tailwind (arbitrary) */
class="text-[#21ade9] bg-[#21ade9]"
/* SCSS */
$brand: #21ade9;
/* SwiftUI */
Color(red: 0.129, green: 0.678, blue: 0.914)
/* Android */
Color.parseColor("#21ade9")Accessibility — WCAG contrast
Aa
#21ade9 on white: 2.56:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#21ade9 on black: 8.22:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red12.9%
Green67.8%
Blue91.4%
CMYK percentages
Cyan85.8%
Magenta25.8%
Yellow0.0%
Key (black)8.6%
Color previews
#21ade9 text on a black background
contrast 8.22:1
Card sample
#21ade9 text on a white background
contrast 2.56:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #21ade9;
Background color
Panel with #21ade9 background
background-color: #21ade9;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #21ade9;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(33, 173, 233, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(33, 173, 233, 0.45);
Border & gradient
Gradient panel
border: 3px solid #21ade9; background: linear-gradient(135deg, #21ade9, #2128E9);