Setting up Background color of Element

I just wanted to know how I can Set the background color of the element without having the color is it being shown on the top and the sides.

Hello! You could set the background colour of the entire html tag, but that may not be what you want. I think the reason this is doing this is due to the fact that the size of the tag you’ve set a background colour of blue doesn’t quite take up the whole size of the page.