How do I reset the color of the sheet on my drawings?

For some reason, the image below is what I see whenever I open any drawing.  The screenshot doesn't have a template applied to it, but it doesn't matter if it's an existing drawing that previously was the standard light tan color, or a new drawing.  They all look like this.

I have no idea if this is related in any way, but it started happening after I had been changing the color of a couple parts when they were in different configurations.  I didn't have the drawing open at the time, but when I did open the drawing, the sheet and ruler had suddenly turned red.  Any help that anyone can provide to figure out what I messed up and what needs changed to fix this would be greatly appreciated!