Div class color

The <div> tag defines a division or a section in an HTML document. The <div> element is often used as a container for other HTML elements to style them with CSS or to perform certain tasks with.. I want to give a background color for the portion covered by the article and the aside only, so i can give the impression that the aside has the same height as the article.. What I want to do, is first lay out all my empty divs on the page, each one with a different colour, so I can clearly see what But it's not working. Is is so that an empty div can't have a background color

HTML div ta

html5 - How to correctly impose a background-color to a div wrapping

DIV background color - HTML & CSS - The SitePoint Forum

Div color: red; : div « Tags « HTML / CS