how to remove background color in css

1element {
2	background-color: transparent;	
3}

1.class {
2   background-color: transparent;
3}

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

1body {
2  background-color: rgb(255,255,255);
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}