How to change the background colour?

Question

without any effects on the letters displayed in output. Thanks in advance!
https://code.sololearn.com/W8rX912F1jCP/?ref=app

Answer 1

D_Stark thanks :)

Answer 2

Thanks a lot Jay Matthews :)

Answer 3

You can change the background color in CSS section
https://code.sololearn.com/WM9xLmjnCIaa/?ref=app

Answer 4

In the body tag..
background-colour:aqua;

Answer 5

background-color: red;

Answer 6

bgcolor =yellow
example

Answer 7

How can I create an <a> tag to display a URL