#400303
a deep, electric red · warm · closest name: black
RGB
64, 3, 3
HSL
0°, 91%, 13%
CMYK
0, 95, 95, 75
Luminance
0.0116
Every format
| HEX | #400303 |
| RGB | rgb(64, 3, 3) |
| HSL | hsl(0, 91%, 13%) |
| CMYK | cmyk(0%, 95%, 95%, 75%) |
| LAB | lab(10.3 28.4 14.9) |
| LCH | lch(10.3 32.1 27.6) |
| OKLCH | oklch(0.237 0.091 27.9) |
Copy-ready code
/* CSS */
color: #400303;
background-color: #400303;
/* Tailwind (arbitrary) */
class="text-[#400303] bg-[#400303]"
/* SCSS */
$brand: #400303;
/* SwiftUI */
Color(red: 0.251, green: 0.012, blue: 0.012)
/* Android */
Color.parseColor("#400303")Accessibility — WCAG contrast
Aa
#400303 on white: 17.04:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#400303 on black: 1.23:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.1%
Green1.2%
Blue1.2%
CMYK percentages
Cyan0.0%
Magenta95.3%
Yellow95.3%
Key (black)74.9%
Color previews
#400303 text on a black background
contrast 1.23:1
Card sample
#400303 text on a white background
contrast 17.04:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #400303;
Background color
Panel with #400303 background
background-color: #400303;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #400303;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(64, 3, 3, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(64, 3, 3, 0.45);
Border & gradient
Gradient panel
border: 3px solid #400303; background: linear-gradient(135deg, #400303, #402C03);