How to set color transparency in css

The way to set color transparency in css is to add the opacity attribute to the specified element and set the appropriate opacity, such as [opacity:0.5;], which means setting the element to semi-transparent.

The operating environment of this article: windows10 system, css 3, thinkpad t480 computer.

The opacity attribute can be used to set the transparency of the element's background; it requires a value between 0 and 1.

0 means completely transparent (opacity:0);

1 means completely opaque (opacity:1);

0.5 means semi-transparent (opacity:0.5);

Syntax:

opacity: value|inherit;

Attribute value:

• value Specifies opacity. From 0.0 (fully transparent) to 1.0 (fully opaque)

• inherit The value of the Opacity attribute should be inherited from the parent element

Code example:

.box1{
                 position:relative;
             width:200px;height:200px;
            background-color: #00f;
            z-index:10;
            opacity:0.5;
     }
          .box2{
               position:absolute;
               top:80px;
               left:80px;
               width:200px;
               height:200px;
               background-color:#0f0;
               z-index:5;
               opacity:0.5;
        }
        .box3{
               position:relative;
               width:200px;
               height:200px;
              background-color:#f00;
             z-index:1;
               opacity:0.5;
 }

Let’s take a look at the running effect:

Related video sharing: css video tutorial

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