Seattle is a busy airport with plenty of operators coming through.  However, the home airline is Alaska and their regional affiliate is Horizon.  Consequently, both of them are very busy.  Horizon operates a fleet of Bombardier Q400s.  They used to have some CRJs too but these have been moved to another operator and now they are dedicated to the turboprops.

They do seem to have really gone to town in applying special liveries to some of their aircraft.  These are focused on a lot of the local colleges and universities.  They do paint up a lot of planes in school colors!  While I was there, I got a surprising number of them passing by.  Here are a few samples of the different schemes they have (along with one normal one just to show that they aren’t all specials).