CREATE TABLE table_204_168 (id DECIMAL, "date" TEXT, "time" TEXT, "opponent" TEXT, "site" TEXT, "tv" TEXT, "result" TEXT, "attendance" DECIMAL, "record" TEXT)

which game was later at night , fiu or northern colorado ?
SELECT "opponent" FROM table_204_168 WHERE "opponent" IN ('fiu', 'northern colorado') ORDER BY "time" DESC LIMIT 1
SELECT "opponent" FROM "table_204_168" WHERE "opponent" IN ('fiu', 'northern colorado') ORDER BY "time" DESC NULLS LAST LIMIT 1