#efff66
a light, electric yellow · cool · closest name: yellow
RGB
239, 255, 102
HSL
66°, 100%, 70%
CMYK
6, 0, 60, 0
Luminance
0.9083
Every format
| HEX | #efff66 |
| RGB | rgb(239, 255, 102) |
| HSL | hsl(66, 100%, 70%) |
| CMYK | cmyk(6%, 0%, 60%, 0%) |
| LAB | lab(96.3 -24.8 69.3) |
| LCH | lch(96.3 73.6 109.7) |
| OKLCH | oklch(0.960 0.175 114.8) |
Copy-ready code
/* CSS */
color: #efff66;
background-color: #efff66;
/* Tailwind (arbitrary) */
class="text-[#efff66] bg-[#efff66]"
/* SCSS */
$brand: #efff66;
/* SwiftUI */
Color(red: 0.937, green: 1.000, blue: 0.400)
/* Android */
Color.parseColor("#efff66")Accessibility — WCAG contrast
Aa
#efff66 on white: 1.10:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#efff66 on black: 19.17:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red93.7%
Green100.0%
Blue40.0%
CMYK percentages
Cyan6.3%
Magenta0.0%
Yellow60.0%
Key (black)0.0%
Color previews
#efff66 text on a black background
contrast 19.17:1
Card sample
#efff66 text on a white background
contrast 1.10:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #efff66;
Background color
Panel with #efff66 background
background-color: #efff66;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #efff66;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(239, 255, 102, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(239, 255, 102, 0.45);
Border & gradient
Gradient panel
border: 3px solid #efff66; background: linear-gradient(135deg, #efff66, #89FF66);