#040a0f
a deep, vivid blue · cool · closest name: black
RGB
4, 10, 15
HSL
207°, 58%, 4%
CMYK
73, 33, 0, 94
Luminance
0.0028
Every format
| HEX | #040a0f |
| RGB | rgb(4, 10, 15) |
| HSL | hsl(207, 58%, 4%) |
| CMYK | cmyk(73%, 33%, 0%, 94%) |
| LAB | lab(2.5 -0.8 -2.7) |
| LCH | lch(2.5 2.8 254.2) |
| OKLCH | oklch(0.140 0.016 238.2) |
Copy-ready code
/* CSS */
color: #040a0f;
background-color: #040a0f;
/* Tailwind (arbitrary) */
class="text-[#040a0f] bg-[#040a0f]"
/* SCSS */
$brand: #040a0f;
/* SwiftUI */
Color(red: 0.016, green: 0.039, blue: 0.059)
/* Android */
Color.parseColor("#040a0f")Accessibility — WCAG contrast
Aa
#040a0f on white: 19.90:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#040a0f on black: 1.06:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red1.6%
Green3.9%
Blue5.9%
CMYK percentages
Cyan73.3%
Magenta33.3%
Yellow0.0%
Key (black)94.1%
Color previews
#040a0f text on a black background
contrast 1.06:1
Card sample
#040a0f text on a white background
contrast 19.90:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #040a0f;
Background color
Panel with #040a0f background
background-color: #040a0f;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #040a0f;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(4, 10, 15, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(4, 10, 15, 0.45);
Border & gradient
Gradient panel
border: 3px solid #040a0f; background: linear-gradient(135deg, #040a0f, #05040F);