Your question, your audience. Choose who sees your identity—and your question—with question security.
By nature, the background color on any div will only show for the length of the content. This means if you're using a background color or border to create the look of a side column, it won't extend all the way to the footer but will stop when the content ends. If the .content div will always contain more content, you can place a border on the .content div to divide it from the column.
Join the community of 500,000 technology professionals and ask your questions.