mutton be said about using colour in CSS background colour is preferable to colour both background colour and code example

Example 1: css change background color of page

/* Use the following code: */
html {background-color: #fefefe;} 
/* You can change the hexedecimal code to RGB, RGBA, name & more colors!*/

Example 2: background css

body {
  background: #ffffff url("img_tree.png") no-repeat fixed right top;
}