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 can be used as a CSS property.

You can use this attribute with the following SVG elements:

Example

<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

Value	`[0-1]` \| <percentage>
Default value	`1`
Animatable	Yes

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].

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`fill-opacity`	?	?	?	?	?	?	?	?	?	?	?	?

Specifications

Specification	Status	Comment
Scalable Vector Graphics (SVG) 2 The definition of 'fill-opacity' in that specification.	Candidate Recommendation	Definition for shapes and texts
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'fill-opacity' in that specification.	Recommendation	Initial definition for shapes and texts

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/fill-opacity