background color html css code example

Example 1: css background color

body {
  background-color: green;
}

Example 2: css transparent background color

div {
 opacity:25% ; 
}

Example 3: background color using css

/* To apply color to background you have to use 'background-color' property and value of property is color name. */
html,body {
  background-color: blue;
}