#283eb7
a dark, vivid blue · warm · closest name: slateblue
RGB
40, 62, 183
HSL
231°, 64%, 44%
CMYK
78, 66, 0, 28
Luminance
0.0732
Every format
| HEX | #283eb7 |
| RGB | rgb(40, 62, 183) |
| HSL | hsl(231, 64%, 44%) |
| CMYK | cmyk(78%, 66%, 0%, 28%) |
| LAB | lab(32.5 35.6 -66.0) |
| LCH | lch(32.5 75.0 298.3) |
| OKLCH | oklch(0.432 0.191 268.6) |
Copy-ready code
/* CSS */
color: #283eb7;
background-color: #283eb7;
/* Tailwind (arbitrary) */
class="text-[#283eb7] bg-[#283eb7]"
/* SCSS */
$brand: #283eb7;
/* SwiftUI */
Color(red: 0.157, green: 0.243, blue: 0.718)
/* Android */
Color.parseColor("#283eb7")Accessibility — WCAG contrast
Aa
#283eb7 on white: 8.53:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#283eb7 on black: 2.46:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red15.7%
Green24.3%
Blue71.8%
CMYK percentages
Cyan78.1%
Magenta66.1%
Yellow0.0%
Key (black)28.2%
Color previews
#283eb7 text on a black background
contrast 2.46:1
Card sample
#283eb7 text on a white background
contrast 8.53:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #283eb7;
Background color
Panel with #283eb7 background
background-color: #283eb7;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #283eb7;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(40, 62, 183, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 62, 183, 0.45);
Border & gradient
Gradient panel
border: 3px solid #283eb7; background: linear-gradient(135deg, #283eb7, #7128B7);