css transparency background color code example

Example 1: css opacity background color

background: rgba(255, 255, 255, 0.25);

Example 2: background color cs rgba

#p1 {background-color:rgba(255,0,0,0.3);}

Example 3: css transparent background color

div {
 opacity:25% ; 
}

Example 4: background color with opacity

h1 {background-color:rgba(255,0,0,0.3);}