The stop-opacity attribute defines the opacity of a given color gradient stop.

The opacity value used for the gradient calculation is the product of the value of stop-opacity and the opacity of the value of the stop-color attribute. For stop-color values that donʼt include explicit opacity information, the opacity is treated as 1.

Note: As a presentation attribute, stop-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 element: <stop>

Usage notes

Value <opacity-value>
Default value 1
Animatable Yes
This value is either a <number> between 0 and 1 or a <percentage> value specifying the opacity of the color gradient stop.


Specification Status Comment
Scalable Vector Graphics (SVG) 2
The definition of 'stop-opacity' in that specification.
Candidate Recommendation Refers to the definition in CSS Colors 3, but allows percentage values.
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'stop-opacity' in that specification.
Recommendation Initial definition

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
stop-opacityChrome ? Edge ? Firefox ? IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?


Compatibility unknown  
Compatibility unknown

See also