#21ade4
a balanced, electric cyan · cool · closest name: steelblue
RGB
33, 173, 228
HSL
197°, 78%, 51%
CMYK
86, 24, 0, 11
Luminance
0.3581
Every format
| HEX | #21ade4 |
| RGB | rgb(33, 173, 228) |
| HSL | hsl(197, 78%, 51%) |
| CMYK | cmyk(86%, 24%, 0%, 11%) |
| LAB | lab(66.4 -16.3 -37.5) |
| LCH | lch(66.4 40.9 246.6) |
| OKLCH | oklch(0.703 0.135 231.4) |
Copy-ready code
/* CSS */
color: #21ade4;
background-color: #21ade4;
/* Tailwind (arbitrary) */
class="text-[#21ade4] bg-[#21ade4]"
/* SCSS */
$brand: #21ade4;
/* SwiftUI */
Color(red: 0.129, green: 0.678, blue: 0.894)
/* Android */
Color.parseColor("#21ade4")Accessibility — WCAG contrast
Aa
#21ade4 on white: 2.57:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#21ade4 on black: 8.16:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red12.9%
Green67.8%
Blue89.4%
CMYK percentages
Cyan85.5%
Magenta24.1%
Yellow0.0%
Key (black)10.6%
Color previews
#21ade4 text on a black background
contrast 8.16:1
Card sample
#21ade4 text on a white background
contrast 2.57:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #21ade4;
Background color
Panel with #21ade4 background
background-color: #21ade4;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #21ade4;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(33, 173, 228, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(33, 173, 228, 0.45);
Border & gradient
Gradient panel
border: 3px solid #21ade4; background: linear-gradient(135deg, #21ade4, #212BE4);