fill-opacity

The fill-opacity attribute is a presentation attribute defining the opacity of the paint server (color, gradient, pattern, etc.) applied to a shape.

[!NOTE] As a presentation attribute, fill-opacity also has a CSS property counterpart: {{cssxref("fill-opacity")}}. When both are specified, the CSS property takes priority.

You can use this attribute with the following SVG elements:

{{SVGElement('circle')}}
{{SVGElement('ellipse')}}
{{SVGElement('path')}}
{{SVGElement('polygon')}}
{{SVGElement('polyline')}}
{{SVGElement('rect')}}
{{SVGElement('text')}}
{{SVGElement('textPath')}}
{{SVGElement('tspan')}}

Example

css

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="0 0 400 100" xmlns="http://www.w3.org/2000/svg">
  <!-- Default fill opacity: 1 -->
  <circle cx="50" cy="50" r="40" />

  <!-- Fill opacity as a number -->
  <circle cx="150" cy="50" r="40" fill-opacity="0.7" />

  <!-- Fill opacity as a percentage -->
  <circle cx="250" cy="50" r="40" fill-opacity="50%" />

  <!-- Fill opacity as a CSS property -->
  <circle cx="350" cy="50" r="40" style="fill-opacity: .25;" />
</svg>

Usage notes

<table class="properties"> <tbody> <tr> <th scope="row">Value</th> <td> <code>[0-1]</code> | <strong ><a href="/en-US/docs/Web/SVG/Guides/Content_type#paint" ><percentage></a ></strong > </td> </tr> <tr> <th scope="row">Default value</th> <td><code>1</code></td> </tr> <tr> <th scope="row">Animatable</th> <td>Yes</td> </tr> </tbody> </table>

[!NOTE] SVG2 introduces percentage values for fill-opacity, however, it is not widely supported yet (See Browser compatibility below) as a consequence, it is best practices to set opacity with a value in the range [0-1].

Example

Usage notes

Specifications

Browser compatibility

See also