#0000ef
a balanced, electric blue · warm · closest name: blue
RGB
0, 0, 239
HSL
240°, 100%, 47%
CMYK
100, 100, 0, 6
Luminance
0.0623
Every format
| HEX | #0000ef |
| RGB | rgb(0, 0, 239) |
| HSL | hsl(240, 100%, 47%) |
| CMYK | cmyk(100%, 100%, 0%, 6%) |
| LAB | lab(30.0 75.4 -102.7) |
| LCH | lch(30.0 127.4 306.3) |
| OKLCH | oklch(0.430 0.298 264.1) |
Copy-ready code
/* CSS */
color: #0000ef;
background-color: #0000ef;
/* Tailwind (arbitrary) */
class="text-[#0000ef] bg-[#0000ef]"
/* SCSS */
$brand: #0000ef;
/* SwiftUI */
Color(red: 0.000, green: 0.000, blue: 0.937)
/* Android */
Color.parseColor("#0000ef")Accessibility — WCAG contrast
Aa
#0000ef on white: 9.35:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#0000ef on black: 2.25:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red0.0%
Green0.0%
Blue93.7%
CMYK percentages
Cyan100.0%
Magenta100.0%
Yellow0.0%
Key (black)6.3%
Color previews
#0000ef text on a black background
contrast 2.25:1
Card sample
#0000ef text on a white background
contrast 9.35:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #0000ef;
Background color
Panel with #0000ef background
background-color: #0000ef;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #0000ef;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(0, 0, 239, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(0, 0, 239, 0.45);
Border & gradient
Gradient panel
border: 3px solid #0000ef; background: linear-gradient(135deg, #0000ef, #9F00EF);