1<body style="background-color: #fff">
2 <!---this will change the body color---!>
3
4</body>
1<body style="background-color:powderblue;">
2<p style="background-color:tomato;">This paragraph has a red background.</p>
3</body>
1<body style="background-color: anything you want">
2 [insert 10000 lines of code here]
3
4</body>
1<!DOCTYPE html>
2<html>
3<body style="background-color:powderblue;">
4
5</body>
6</html>
7