#283fba
a dark, vivid blue · warm · closest name: slateblue
RGB
40, 63, 186
HSL
231°, 65%, 44%
CMYK
79, 66, 0, 27
Luminance
0.0755
Every format
| HEX | #283fba |
| RGB | rgb(40, 63, 186) |
| HSL | hsl(231, 65%, 44%) |
| CMYK | cmyk(79%, 66%, 0%, 27%) |
| LAB | lab(33.0 36.1 -66.9) |
| LCH | lch(33.0 76.0 298.3) |
| OKLCH | oklch(0.437 0.194 268.4) |
Copy-ready code
/* CSS */
color: #283fba;
background-color: #283fba;
/* Tailwind (arbitrary) */
class="text-[#283fba] bg-[#283fba]"
/* SCSS */
$brand: #283fba;
/* SwiftUI */
Color(red: 0.157, green: 0.247, blue: 0.729)
/* Android */
Color.parseColor("#283fba")Accessibility — WCAG contrast
Aa
#283fba on white: 8.37:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#283fba on black: 2.51:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red15.7%
Green24.7%
Blue72.9%
CMYK percentages
Cyan78.5%
Magenta66.1%
Yellow0.0%
Key (black)27.1%
Color previews
#283fba text on a black background
contrast 2.51:1
Card sample
#283fba text on a white background
contrast 8.37:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #283fba;
Background color
Panel with #283fba background
background-color: #283fba;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #283fba;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(40, 63, 186, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 63, 186, 0.45);
Border & gradient
Gradient panel
border: 3px solid #283fba; background: linear-gradient(135deg, #283fba, #7228BA);