style bg color code example

Example 1: css background color

body {
  background-color: green;
}

Example 2: background color css rgb

body {
  background-color: rgb(255,255,255);
}

Example 3: background color css

html,body {
  background-color: red;
}

Example 4: css transparent background color

div {
 opacity:25% ; 
}