opacity
The opacity
attribute specifies the transparency of an object or of a group of objects, that is, the degree to which the background behind the element is overlaid.
Note: As a presentation attribute, opacity
can be used as a CSS property. See the CSS opacity
property for more information.
You can use this attribute with the following SVG elements:
Example
html
<svg viewBox="0 0 200 100" xmlns="http://www.w3.org/2000/svg">
<defs>
<linearGradient id="gradient" x1="0%" y1="0%" x2="0" y2="100%">
<stop offset="0%" style="stop-color:skyblue;" />
<stop offset="100%" style="stop-color:seagreen;" />
</linearGradient>
</defs>
<rect x="0" y="0" width="100%" height="100%" fill="url(#gradient)" />
<circle cx="50" cy="50" r="40" fill="black" />
<circle cx="150" cy="50" r="40" fill="black" opacity="0.3" />
</svg>
Usage notes
Default value | 1 |
---|---|
Value | <alpha-value> |
Animatable | Yes |
<alpha-value>
-
The uniform opacity setting to be applied across an entire object, as a
<number>
. Any values outside the range 0.0 (fully transparent) to 1.0 (fully opaque) will be clamped to this range.
Specifications
Specification |
---|
CSS Color Module Level 4 # transparency |
Scalable Vector Graphics (SVG) 2 # ObjectAndGroupOpacityProperties |
Browser compatibility
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