#666df4
a light, electric blue · warm · closest name: royalblue
RGB
102, 109, 244
HSL
237°, 87%, 68%
CMYK
58, 55, 0, 4
Luminance
0.2029
Every format
| HEX | #666df4 |
| RGB | rgb(102, 109, 244) |
| HSL | hsl(237, 87%, 68%) |
| CMYK | cmyk(58%, 55%, 0%, 4%) |
| LAB | lab(52.2 36.0 -68.8) |
| LCH | lch(52.2 77.6 297.6) |
| OKLCH | oklch(0.602 0.199 276.4) |
Copy-ready code
/* CSS */
color: #666df4;
background-color: #666df4;
/* Tailwind (arbitrary) */
class="text-[#666df4] bg-[#666df4]"
/* SCSS */
$brand: #666df4;
/* SwiftUI */
Color(red: 0.400, green: 0.427, blue: 0.957)
/* Android */
Color.parseColor("#666df4")Accessibility — WCAG contrast
Aa
#666df4 on white: 4.15:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#666df4 on black: 5.06:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green42.7%
Blue95.7%
CMYK percentages
Cyan58.2%
Magenta55.3%
Yellow0.0%
Key (black)4.3%
Color previews
#666df4 text on a black background
contrast 5.06:1
Card sample
#666df4 text on a white background
contrast 4.15:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #666df4;
Background color
Panel with #666df4 background
background-color: #666df4;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #666df4;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 109, 244, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 109, 244, 0.45);
Border & gradient
Gradient panel
border: 3px solid #666df4; background: linear-gradient(135deg, #666df4, #BD66F4);