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Achieve Glow Effect with CSS Filters
The CSS glow effect is a visual technique used to create a luminous halo around elements. This effect makes objects appear to emit light and can be achieved using the drop-shadow filter or box-shadow properties.
Syntax
/* Using drop-shadow filter */
selector {
filter: drop-shadow(0 0 blur-radius color);
}
/* Using box-shadow */
selector {
box-shadow: 0 0 blur-radius color;
}
Parameters
| Parameter | Description |
|---|---|
blur-radius |
The amount of blur for the glow effect (in px) |
color |
The color of the glow (hex, rgb, or named colors) |
spread-radius |
Optional: How much the glow expands (box-shadow only) |
Example 1: Text Glow Effect
This example creates a glowing text effect using the text-shadow property −
<!DOCTYPE html>
<html>
<head>
<style>
.glow-text {
font-size: 3em;
font-family: Arial, sans-serif;
color: #ffffff;
text-align: center;
background-color: #333;
padding: 50px;
text-shadow: 0 0 20px #00ff00, 0 0 30px #00ff00, 0 0 40px #00ff00;
}
</style>
</head>
<body>
<div class="glow-text">CSS GLOW</div>
</body>
</html>
Large white text "CSS GLOW" with a bright green glow effect on a dark background.
Example 2: Image Glow with Filter
This example applies a glow effect to an image using the drop-shadow filter −
<!DOCTYPE html>
<html>
<head>
<style>
.glow-image {
width: 200px;
height: 200px;
background-color: #ff6b6b;
border-radius: 50%;
margin: 50px auto;
filter: drop-shadow(0 0 25px #ff6b6b);
}
body {
background-color: #222;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
margin: 0;
}
</style>
</head>
<body>
<div class="glow-image"></div>
</body>
</html>
A red circular element with a matching red glow effect around it on a dark background.
Example 3: Box Glow Effect
This example creates a glowing box using box-shadow with multiple shadows −
<!DOCTYPE html>
<html>
<head>
<style>
.glow-box {
width: 250px;
height: 100px;
background-color: #4a90e2;
margin: 50px auto;
border-radius: 10px;
display: flex;
align-items: center;
justify-content: center;
color: white;
font-size: 1.2em;
box-shadow:
0 0 10px #4a90e2,
0 0 20px #4a90e2,
0 0 30px #4a90e2,
0 0 40px #4a90e2;
}
body {
background-color: #1a1a1a;
padding: 50px;
}
</style>
</head>
<body>
<div class="glow-box">Glowing Box</div>
</body>
</html>
A blue rounded rectangle with white text "Glowing Box" surrounded by an intense blue glow effect.
Conclusion
CSS glow effects can be achieved using text-shadow, box-shadow, or filter: drop-shadow(). Multiple shadows with increasing blur values create more realistic and intense glow effects.
Updated on: 2026-03-15T11:31:52+05:30
966 Views
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