#3700ff
a balanced, electric blue · warm · closest name: blue
RGB
55, 0, 255
HSL
253°, 100%, 50%
CMYK
78, 100, 0, 0
Luminance
0.0803
Every format
| HEX | #3700ff |
| RGB | rgb(55, 0, 255) |
| HSL | hsl(253, 100%, 50%) |
| CMYK | cmyk(78%, 100%, 0%, 0%) |
| LAB | lab(34.0 79.8 -104.9) |
| LCH | lch(34.0 131.8 307.3) |
| OKLCH | oklch(0.469 0.303 271.6) |
Copy-ready code
/* CSS */
color: #3700ff;
background-color: #3700ff;
/* Tailwind (arbitrary) */
class="text-[#3700ff] bg-[#3700ff]"
/* SCSS */
$brand: #3700ff;
/* SwiftUI */
Color(red: 0.216, green: 0.000, blue: 1.000)
/* Android */
Color.parseColor("#3700ff")Accessibility — WCAG contrast
Aa
#3700ff on white: 8.06:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#3700ff on black: 2.61:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red21.6%
Green0.0%
Blue100.0%
CMYK percentages
Cyan78.4%
Magenta100.0%
Yellow0.0%
Key (black)0.0%
Color previews
#3700ff text on a black background
contrast 2.61:1
Card sample
#3700ff text on a white background
contrast 8.06:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3700ff;
Background color
Panel with #3700ff background
background-color: #3700ff;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3700ff;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(55, 0, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(55, 0, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3700ff; background: linear-gradient(135deg, #3700ff, #E100FF);