Help with changing the background color.

Hi guys I was wondering if someone here would be able to help me with an assignment, because I've got no idea where to go with a certain part of it.The portion I can't figure out is as follows:- Three input text boxes and a button that allow the user to enter red, green, and blue values to change the background color of the content div. When the user clicks the button, the background color should change. https://chatrandom.download/ https://azar.pro Any help would be greatly appreciated. If any context helps, we're working in js, as well as CSS in addition to html. Thanks