#040c21
a deep, electric blue · cool · closest name: black
RGB
4, 12, 33
HSL
223°, 78%, 7%
CMYK
88, 64, 0, 87
Luminance
0.0040
Every format
| HEX | #040c21 |
| RGB | rgb(4, 12, 33) |
| HSL | hsl(223, 78%, 7%) |
| CMYK | cmyk(88%, 64%, 0%, 87%) |
| LAB | lab(3.6 3.2 -14.1) |
| LCH | lch(3.6 14.4 282.7) |
| OKLCH | oklch(0.160 0.047 263.5) |
Copy-ready code
/* CSS */
color: #040c21;
background-color: #040c21;
/* Tailwind (arbitrary) */
class="text-[#040c21] bg-[#040c21]"
/* SCSS */
$brand: #040c21;
/* SwiftUI */
Color(red: 0.016, green: 0.047, blue: 0.129)
/* Android */
Color.parseColor("#040c21")Accessibility — WCAG contrast
Aa
#040c21 on white: 19.45:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#040c21 on black: 1.08:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red1.6%
Green4.7%
Blue12.9%
CMYK percentages
Cyan87.9%
Magenta63.6%
Yellow0.0%
Key (black)87.1%
Color previews
#040c21 text on a black background
contrast 1.08:1
Card sample
#040c21 text on a white background
contrast 19.45:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #040c21;
Background color
Panel with #040c21 background
background-color: #040c21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #040c21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(4, 12, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(4, 12, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #040c21; background: linear-gradient(135deg, #040c21, #0F0421);