#183f4f
a deep, vivid cyan · cool · closest name: darkslategray
RGB
24, 63, 79
HSL
198°, 53%, 20%
CMYK
70, 20, 0, 69
Luminance
0.0431
Every format
| HEX | #183f4f |
| RGB | rgb(24, 63, 79) |
| HSL | hsl(198, 53%, 20%) |
| CMYK | cmyk(70%, 20%, 0%, 69%) |
| LAB | lab(24.7 -8.0 -13.8) |
| LCH | lch(24.7 15.9 239.9) |
| OKLCH | oklch(0.347 0.052 228.0) |
Copy-ready code
/* CSS */
color: #183f4f;
background-color: #183f4f;
/* Tailwind (arbitrary) */
class="text-[#183f4f] bg-[#183f4f]"
/* SCSS */
$brand: #183f4f;
/* SwiftUI */
Color(red: 0.094, green: 0.247, blue: 0.310)
/* Android */
Color.parseColor("#183f4f")Accessibility — WCAG contrast
Aa
#183f4f on white: 11.27:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#183f4f on black: 1.86:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red9.4%
Green24.7%
Blue31.0%
CMYK percentages
Cyan69.6%
Magenta20.3%
Yellow0.0%
Key (black)69.0%
Color previews
#183f4f text on a black background
contrast 1.86:1
Card sample
#183f4f text on a white background
contrast 11.27:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #183f4f;
Background color
Panel with #183f4f background
background-color: #183f4f;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #183f4f;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(24, 63, 79, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(24, 63, 79, 0.45);
Border & gradient
Gradient panel
border: 3px solid #183f4f; background: linear-gradient(135deg, #183f4f, #181A4F);