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 don't include explicit opacity information, the opacity is treated as 1.

Note: As a presentation attribute, stop-opacity can be used as a CSS property.

You can use this attribute with the following SVG elements:

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

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See also