#21fdda
a balanced, electric cyan · cool · closest name: aquamarine
RGB
33, 253, 218
HSL
171°, 98%, 56%
CMYK
87, 0, 14, 1
Luminance
0.7564
Every format
| HEX | #21fdda |
| RGB | rgb(33, 253, 218) |
| HSL | hsl(171, 98%, 56%) |
| CMYK | cmyk(87%, 0%, 14%, 1%) |
| LAB | lab(89.7 -56.3 3.0) |
| LCH | lch(89.7 56.4 177.0) |
| OKLCH | oklch(0.891 0.161 177.5) |
Copy-ready code
/* CSS */
color: #21fdda;
background-color: #21fdda;
/* Tailwind (arbitrary) */
class="text-[#21fdda] bg-[#21fdda]"
/* SCSS */
$brand: #21fdda;
/* SwiftUI */
Color(red: 0.129, green: 0.992, blue: 0.855)
/* Android */
Color.parseColor("#21fdda")Accessibility — WCAG contrast
Aa
#21fdda on white: 1.30:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#21fdda on black: 16.13:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red12.9%
Green99.2%
Blue85.5%
CMYK percentages
Cyan87.0%
Magenta0.0%
Yellow13.8%
Key (black)0.8%
Color previews
#21fdda text on a black background
contrast 16.13:1
Card sample
#21fdda text on a white background
contrast 1.30:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #21fdda;
Background color
Panel with #21fdda background
background-color: #21fdda;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #21fdda;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(33, 253, 218, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(33, 253, 218, 0.45);
Border & gradient
Gradient panel
border: 3px solid #21fdda; background: linear-gradient(135deg, #21fdda, #218DFD);