Another colorized classic comedy special is repeated tonight. I Love Lucy was a shining light of Fifties TV, and The Dick Van Dyke Show the apex of sitcoms in the Sixties, so pairing them, on Christmas night, is a special gift for TV fans. The two episodes shown here, “That’s My Boy?” and “Coast-to-Coast Big Mouth,” are high-watermark classics, and the only thing that really bothers me about the colorization, this time around, are the colors in the Petrie living room.