fill-opacity

SVG Elements
1. A
2. B-C
3. D
  1. <defs>
  2. <desc>
4. E
  1. <ellipse>
5. F
6. G
7. H
  1. <hkern>
8. I
  1. <image>
9. J-L
  1. <line>
  2. <linearGradient>
10. M
11. N-P
12. Q-R
  1. <radialGradient>
  2. <rect>
13. S
  1. <script>
  2. <set>
  3. <stop>
  4. <style>
  5. <svg>
  6. <switch>
  7. <symbol>
14. T
15. U
  1. <use>
16. V-Z
  1. <view>
  2. <vkern>

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

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].

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

Browser compatibility

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