#0000ff
a balanced, electric blue · warm · “blue”
RGB
0, 0, 255
HSL
240°, 100%, 50%
CMYK
100, 100, 0, 0
Luminance
0.0722
Every format
| HEX | #0000ff |
| RGB | rgb(0, 0, 255) |
| HSL | hsl(240, 100%, 50%) |
| CMYK | cmyk(100%, 100%, 0%, 0%) |
| LAB | lab(32.3 79.2 -107.9) |
| LCH | lch(32.3 133.8 306.3) |
| OKLCH | oklch(0.452 0.313 264.1) |
Copy-ready code
/* CSS */
color: #0000ff;
background-color: #0000ff;
/* Tailwind (arbitrary) */
class="text-[#0000ff] bg-[#0000ff]"
/* SCSS */
$brand: #0000ff;
/* SwiftUI */
Color(red: 0.000, green: 0.000, blue: 1.000)
/* Android */
Color.parseColor("#0000ff")Accessibility — WCAG contrast
Aa
#0000ff on white: 8.59:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#0000ff on black: 2.44:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red0.0%
Green0.0%
Blue100.0%
CMYK percentages
Cyan100.0%
Magenta100.0%
Yellow0.0%
Key (black)0.0%
Color previews
#0000ff text on a black background
contrast 2.44:1
Card sample
#0000ff text on a white background
contrast 8.59:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #0000ff;
Background color
Panel with #0000ff background
background-color: #0000ff;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #0000ff;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(0, 0, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(0, 0, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #0000ff; background: linear-gradient(135deg, #0000ff, #AA00FF);