#21ddf5
a balanced, electric cyan · cool · closest name: cyan
RGB
33, 221, 245
HSL
187°, 91%, 55%
CMYK
87, 10, 0, 4
Luminance
0.5863
Every format
| HEX | #21ddf5 |
| RGB | rgb(33, 221, 245) |
| HSL | hsl(187, 91%, 55%) |
| CMYK | cmyk(87%, 10%, 0%, 4%) |
| LAB | lab(81.1 -34.8 -24.0) |
| LCH | lch(81.1 42.2 214.6) |
| OKLCH | oklch(0.823 0.138 209.1) |
Copy-ready code
/* CSS */
color: #21ddf5;
background-color: #21ddf5;
/* Tailwind (arbitrary) */
class="text-[#21ddf5] bg-[#21ddf5]"
/* SCSS */
$brand: #21ddf5;
/* SwiftUI */
Color(red: 0.129, green: 0.867, blue: 0.961)
/* Android */
Color.parseColor("#21ddf5")Accessibility — WCAG contrast
Aa
#21ddf5 on white: 1.65:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#21ddf5 on black: 12.73:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red12.9%
Green86.7%
Blue96.1%
CMYK percentages
Cyan86.5%
Magenta9.8%
Yellow0.0%
Key (black)3.9%
Color previews
#21ddf5 text on a black background
contrast 12.73:1
Card sample
#21ddf5 text on a white background
contrast 1.65:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #21ddf5;
Background color
Panel with #21ddf5 background
background-color: #21ddf5;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #21ddf5;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(33, 221, 245, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(33, 221, 245, 0.45);
Border & gradient
Gradient panel
border: 3px solid #21ddf5; background: linear-gradient(135deg, #21ddf5, #2150F5);