#21f3df
a balanced, electric cyan · cool · closest name: turquoise
RGB
33, 243, 223
HSL
174°, 90%, 54%
CMYK
86, 0, 8, 5
Luminance
0.6975
Every format
| HEX | #21f3df |
| RGB | rgb(33, 243, 223) |
| HSL | hsl(174, 90%, 54%) |
| CMYK | cmyk(86%, 0%, 8%, 5%) |
| LAB | lab(86.9 -50.9 -3.7) |
| LCH | lch(86.9 51.0 184.2) |
| OKLCH | oklch(0.868 0.150 184.2) |
Copy-ready code
/* CSS */
color: #21f3df;
background-color: #21f3df;
/* Tailwind (arbitrary) */
class="text-[#21f3df] bg-[#21f3df]"
/* SCSS */
$brand: #21f3df;
/* SwiftUI */
Color(red: 0.129, green: 0.953, blue: 0.875)
/* Android */
Color.parseColor("#21f3df")Accessibility — WCAG contrast
Aa
#21f3df on white: 1.40:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#21f3df on black: 14.95:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red12.9%
Green95.3%
Blue87.5%
CMYK percentages
Cyan86.4%
Magenta0.0%
Yellow8.2%
Key (black)4.7%
Color previews
#21f3df text on a black background
contrast 14.95:1
Card sample
#21f3df text on a white background
contrast 1.40:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #21f3df;
Background color
Panel with #21f3df background
background-color: #21f3df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #21f3df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(33, 243, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(33, 243, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #21f3df; background: linear-gradient(135deg, #21f3df, #217BF3);