#155fd3
a balanced, electric blue · cool · closest name: royalblue
RGB
21, 95, 211
HSL
217°, 82%, 46%
CMYK
90, 55, 0, 17
Luminance
0.1305
Every format
| HEX | #155fd3 |
| RGB | rgb(21, 95, 211) |
| HSL | hsl(217, 82%, 46%) |
| CMYK | cmyk(90%, 55%, 0%, 17%) |
| LAB | lab(42.8 23.4 -65.5) |
| LCH | lch(42.8 69.5 289.7) |
| OKLCH | oklch(0.515 0.192 260.0) |
Copy-ready code
/* CSS */
color: #155fd3;
background-color: #155fd3;
/* Tailwind (arbitrary) */
class="text-[#155fd3] bg-[#155fd3]"
/* SCSS */
$brand: #155fd3;
/* SwiftUI */
Color(red: 0.082, green: 0.373, blue: 0.827)
/* Android */
Color.parseColor("#155fd3")Accessibility — WCAG contrast
Aa
#155fd3 on white: 5.82:1
AA ✓ pass · AA-large ✓ · AAA ✗
Aa
#155fd3 on black: 3.61:1
AA ✗ fail · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red8.2%
Green37.3%
Blue82.7%
CMYK percentages
Cyan90.0%
Magenta55.0%
Yellow0.0%
Key (black)17.3%
Color previews
#155fd3 text on a black background
contrast 3.61:1
Card sample
#155fd3 text on a white background
contrast 5.82:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #155fd3;
Background color
Panel with #155fd3 background
background-color: #155fd3;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #155fd3;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(21, 95, 211, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(21, 95, 211, 0.45);
Border & gradient
Gradient panel
border: 3px solid #155fd3; background: linear-gradient(135deg, #155fd3, #4A15D3);