#040afb
a balanced, electric blue · warm · closest name: blue
RGB
4, 10, 251
HSL
239°, 97%, 50%
CMYK
98, 96, 0, 2
Luminance
0.0721
Every format
| HEX | #040afb |
| RGB | rgb(4, 10, 251) |
| HSL | hsl(239, 97%, 50%) |
| CMYK | cmyk(98%, 96%, 0%, 2%) |
| LAB | lab(32.3 76.7 -105.7) |
| LCH | lch(32.3 130.6 306.0) |
| OKLCH | oklch(0.451 0.307 264.4) |
Copy-ready code
/* CSS */
color: #040afb;
background-color: #040afb;
/* Tailwind (arbitrary) */
class="text-[#040afb] bg-[#040afb]"
/* SCSS */
$brand: #040afb;
/* SwiftUI */
Color(red: 0.016, green: 0.039, blue: 0.984)
/* Android */
Color.parseColor("#040afb")Accessibility — WCAG contrast
Aa
#040afb on white: 8.60:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#040afb on black: 2.44:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red1.6%
Green3.9%
Blue98.4%
CMYK percentages
Cyan98.4%
Magenta96.0%
Yellow0.0%
Key (black)1.6%
Color previews
#040afb text on a black background
contrast 2.44:1
Card sample
#040afb text on a white background
contrast 8.60:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #040afb;
Background color
Panel with #040afb background
background-color: #040afb;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #040afb;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(4, 10, 251, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(4, 10, 251, 0.45);
Border & gradient
Gradient panel
border: 3px solid #040afb; background: linear-gradient(135deg, #040afb, #A304FB);