#efef21
a balanced, electric yellow · cool · closest name: yellow
RGB
239, 239, 33
HSL
60°, 87%, 53%
CMYK
0, 0, 86, 6
Luminance
0.8019
Every format
| HEX | #efef21 |
| RGB | rgb(239, 239, 33) |
| HSL | hsl(60, 87%, 53%) |
| CMYK | cmyk(0%, 0%, 86%, 6%) |
| LAB | lab(91.8 -20.1 86.3) |
| LCH | lch(91.8 88.6 103.1) |
| OKLCH | oklch(0.922 0.196 109.7) |
Copy-ready code
/* CSS */
color: #efef21;
background-color: #efef21;
/* Tailwind (arbitrary) */
class="text-[#efef21] bg-[#efef21]"
/* SCSS */
$brand: #efef21;
/* SwiftUI */
Color(red: 0.937, green: 0.937, blue: 0.129)
/* Android */
Color.parseColor("#efef21")Accessibility — WCAG contrast
Aa
#efef21 on white: 1.23:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#efef21 on black: 17.04:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red93.7%
Green93.7%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta0.0%
Yellow86.2%
Key (black)6.3%
Color previews
#efef21 text on a black background
contrast 17.04:1
Card sample
#efef21 text on a white background
contrast 1.23:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #efef21;
Background color
Panel with #efef21 background
background-color: #efef21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #efef21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(239, 239, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(239, 239, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #efef21; background: linear-gradient(135deg, #efef21, #66EF21);