You've not told us which program you're using!
Are you using a word processor (such as Microsoft Word or the relevant component of an alternative office suite, such as OpenOffice, Libre Office or WPS Office), a DTP program (such as Microsoft Publisher, QuarkXpress, Serif PagePlus) or something else? It makes a difference!
[NB: If it's Microsoft Word, we'll probably need to know the version too]
However, at a bit of a wild guess, I'll assume that it's Microsoft Word (or similar) and that you've accidentally invoked 'Web Layout':
Microsoft Word (and other word processors) can be used to create web pages, as well as print documents. When you do so, you're required to provide information about the background colours, etc, together with the URL of the website. That seems to be what you're being asked for now.
So you need to find a way to get out of 'Web Layout'. With some versions of Microsoft Word there are buttons, at the very foot of the window, which show 'Print Layout', 'Web Layout', 'Outline', etc when you hover your mouse over them. (If you can find such buttons then try clicking on 'Print Layout'). With other versions of Word you might have to look in the ribbons at the top to find a way to change from a web document to a print one.