CREATE TABLE table_28391 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Nickname" TEXT, "Joined" TEXT, "Primary Conference" TEXT, "Colors" TEXT)

How many have the colors blue & gold?
SELECT COUNT("Institution") FROM table_28391 WHERE "Colors" = 'Blue & Gold'
SELECT COUNT("Institution") FROM "table_28391" WHERE "Colors" = 'Blue & Gold'