CSS3 Opacity

Syntax :

E { opacity:number;}

Number : Is in decimal fraction. That is a number between 0.0 and 1.0.

0.0                                                  0.0  is fully transparent and 1.0 is fully opaque.

       Example: 

       CSS :

     

      #opacity {

                                      background-color:black;

                                      height:100px;

                                      width:100px;

                                      opacity:.5;

                             }

       HTML

        <div id="opacity"></div>

       Output:

       Before Opacity : 

       After Opacity :