Washington’s offense looked right at home inside Autzen Stadium in Eugene, Ore. Literally, Kalen DeBoer’s team wore purple jerseys and pants — a look typically reserved for Husky home games — during the 114th meeting of Pacific Northwest rivals on Saturday. A conspiracy theorist might chalk up that choice as a silent reflection of the road team’s comfort inside notoriously un-friendly confines. But UW’s offense — outside of one untimely turnover — spoke loudly enough in Saturday’s stunning 37-34 upset win. And after a four-year wait, Peyton Henry delivered redemption. Henry — who missed a 37-y…