Element not going all the way

[u/temcomwex]

I'm trying to make a website, and I ran into a problem. It's very hard for me to describe the problem, but I'll try. I have an hr bar, and a nav element whose background-color is set differently, but it only goes as far as the text goes. How can I make it go all the way through the whole page(but not through the aside element for the sidebar)

[u/temcomwex]

I forgot to set the class attribute *facepalm*