how to change background color in css

1body {
2  background-color: green;
3}

1html,body {
2  background-color: red;
3}

1/* To apply color to background you have to use 'background-color' property and value of property is color name. */
2html,body {
3  background-color: blue;
4}

1body{
2  background: lightblue;
3}

1body {
2	background-color: red; 
3}

1//javascript type css:
2document.body.style.backgroundColor = "blue";
3// or inline css:
4<div style="background-color: blue;"></div>