Question about customizing the Photofocus Pro theme

Hi! So, now that we have the Photofocus Pro theme installed, I'm starting to customize it. First, I wanted to change the background color of each page to white, but in the "Colors" section of the "customize theme" area, I noticed two color settings: Background Color Page Background Color Since I didn't know the difference between the two, I set "Background Color" to green (#81d742) and I set "Page Background Color" to an amber color (#dd9933). When I view the site, *all* of the pages have the background color of green, meaning the "Background Color" setting was used. That's fine, but my question is: what is "Page Background Color" used for? Thanks in advance!