Joseph and the Amazing Technicolor Dreamcoat. This is a slight piece, composed by Andrew Lloyd Webber and lyricist Tim Rice in 1968 as a twenty-minute-long pop cantata for a school concert. An embryonic work, it is also far less pretentious than the puffed-up, overblown extravaganzas of later years. The musical tells the biblical story of Joseph, son of Jacob, whose brothers resent the love shown to him by their father and exemplified by the coat of many colors the old man has given him. They sell Joseph into slavery. After a lot of shenanigans that include a false charge of seduction, time in prison and the practice of prophesy for the Pharaoh, Joseph becomes a big man in Egypt. Eventually, the perfidious brothers appear, begging for food. All this is leavened with musical jokes and lots of effervescent humor. Time periods swirl into each other as schoolchildren in baseball caps move among ancient Egyptians wearing golden headdresses. The cast is talented, and the members work well together. Presented by Boulder's Dinner Theatre through June 20, 5501 Arapahoe Avenue, Boulder, 303-449-6000, www.theatreinboulder.com. Reviewed March 18.