CREATE TABLE table_39920 ("School" TEXT, "Nickname" TEXT, "Colors" TEXT, "League" TEXT, "Class" TEXT, "Division" TEXT)

What is the nickname of the team that has the colors blue and gold?
SELECT "Nickname" FROM table_39920 WHERE "Colors" = 'blue and gold'
SELECT "Nickname" FROM "table_39920" WHERE "Colors" = 'blue and gold'