RED RISING
Mechanically, your color has minimal impact on your starting character. This is mostly flavor, so pick the color that you think will be the most fun to tell a story with!
GENESYS
Genesys never uses a single column like this for just regular text. You may occasionally see it used for particularly large "Note" sections or Tables, though. You can create one of these with the HTML DIV tag and the "wide" class. It can be tricky to correctly position these, so be careful! You cannot use a "wide" class after a \columnbreak or things get REALLY out of control.