I see 4 sets of colors for code highlights: light green, dark green, light red and dark red. I'm not entirely sure what they mean and which code I should look at when doing a PR review. Mainly do I look at only dark green code or light green as well? How is light red different from dark red?
This get's especially confusing when dealing with a PR that branched off a different un-merged branch and I'm unsure of which code to be focusing on.
