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.
As a presentation attribute, it can be applied to any element but it has effect only on the following eleven elements: <altGlyph>
, <circle>
, <ellipse>
, <path>
, <polygon>
, <polyline>
, <rect>
, <text>
, <textPath>
, <tref>
, and <tspan>
html,body,svg { height:100% }
<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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
fill-opacity | Chrome ? | Edge ? | Firefox ? | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Compatibility unknown
- Compatibility unknown
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 |