#666cd1
a balanced, vivid blue · warm · closest name: slateblue
RGB
102, 108, 209
HSL
237°, 54%, 61%
CMYK
51, 48, 0, 18
Luminance
0.1815
Every format
| HEX | #666cd1 |
| RGB | rgb(102, 108, 209) |
| HSL | hsl(237, 54%, 61%) |
| CMYK | cmyk(51%, 48%, 0%, 18%) |
| LAB | lab(49.7 25.5 -53.1) |
| LCH | lch(49.7 58.9 295.7) |
| OKLCH | oklch(0.576 0.153 277.9) |
Copy-ready code
/* CSS */
color: #666cd1;
background-color: #666cd1;
/* Tailwind (arbitrary) */
class="text-[#666cd1] bg-[#666cd1]"
/* SCSS */
$brand: #666cd1;
/* SwiftUI */
Color(red: 0.400, green: 0.424, blue: 0.820)
/* Android */
Color.parseColor("#666cd1")Accessibility — WCAG contrast
Aa
#666cd1 on white: 4.53:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#666cd1 on black: 4.63:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green42.4%
Blue82.0%
CMYK percentages
Cyan51.2%
Magenta48.3%
Yellow0.0%
Key (black)18.0%
Color previews
#666cd1 text on a black background
contrast 4.63:1
Card sample
#666cd1 text on a white background
contrast 4.53:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #666cd1;
Background color
Panel with #666cd1 background
background-color: #666cd1;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #666cd1;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 108, 209, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 108, 209, 0.45);
Border & gradient
Gradient panel
border: 3px solid #666cd1; background: linear-gradient(135deg, #666cd1, #A766D1);