The 1950s were very colorful. Just like the 1956 Buicks! In 1956, Buick offered 20 base colors, which could be used as solid, two-tone or even three-tone paint. Two-tone means that roof and body had different colors.
Note: Color accuracy varies by computer/device settings and depends on the actual light. See complete 1956 Buick color chart for Duco Paint numbers.