Check out example codes for "backgroud color css". It will help you in understanding the concepts better.

Code Example 1

body {
  background-color: green;

Code Example 2

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

Code Example 3

background-color: blue;

Code Example 4

//javascript type css: = "blue";
// or inline css:
<div style="background-color: blue;"></div>

Code Example 5

body {
  background-color: lightblue;

Code Example 6

<body bgcolor="some color">
 HTML goes here

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